Reviewed publications Soszyński, I., Udalski, A., Szymański, M. K., et al. Concluding Henrietta Leavitt's Work on Classical Cepheids in the Magellanic System and Other Updates of the OGLE Collection of Variable Stars, 2017, Acta Astronomica, 67, 103 Soszyński, I., Udalski, A., Szymański, M. K., et al. The OGLE Collection of Variable Stars. Classical, Type II, and Anomalous Cepheids toward the Galactic Center, 2017, Acta Astronomica, 67, 297 Soszyński, I., Udalski, A., Szymański, M. K., et al. The OGLE Collection of Variable Stars. Type II Cepheids in the Magellanic System, 2018, Acta Astronomica, 68, 89 Iwanek, P., Soszyński, I., Skowron, D., et al. Three-Dimensional Distributions of Type II Cepheids and Anomalous Cepheids in the Magellanic Clouds. Do these Stars Belong to the Old, Young or Intermediate-Age Population?, 2018, Acta Astronomica, 68, 213 Netzel, H., Smolec, R., Soszyński, I., Udalski, A. Blazhko effect in the first overtone RR Lyrae stars of the OGLE Galactic bulge collection, 2018, Monthly Notices of the Royal Astronomical Society, 480, 1229 Udalski, A., Soszyński, I., Pietrukowicz, P., et al. OGLE Collection of Galactic Cepheids, 2018, Acta Astronomica, 68, 315 Smolec, R., Moskalik, P., Plachy, E., Soszyński, I., Udalski, A. Diversity of dynamical phenomena in type II Cepheids of the OGLE collection, 2018, Monthly Notices of the Royal Astronomical Society, 481, 3724 Mróz, P., Udalski, A., Skowron, D. M., et al. Rotation Curve of the Milky Way from Classical Cepheids, 2019, The Astrophysical Journal Letters, 870, L10 Soszyński, I., Smolec, R., Udalski, A., Pietrukowicz, P. Type II Cepheids Pulsating in the First Overtone from the OGLE Survey, 2019, The Astrophysical Journal, 873, 43 Iwanek, P., Soszyński, I., Skowron, J. et al. 12,660 Spotted Stars toward the OGLE Galactic Bulge Fields, 2019, The Astrophysical Journal, 879, 114 Soszyński, I., Udalski, A., Szymański, M. K., et al. Final Release of the OGLE Collection of Cepheids and RR Lyrae Stars in the Magellanic System. The Outer Regions, 2019, Acta Astronomica, 69, 87 Skowron, D. M., Skowron, J., Mróz, P., et al. A three-dimensional map of the Milky Way using classical Cepheid variable stars, 2019, Science, 365, 478 Skowron, D. M., Skowron, J., Mróz, P., et al. Mapping the Northern Galactic Disk Warp with Classical Cepheids, 2019, Acta Astronomica, 69, 305 Soszyński, I., Udalski, A., Wrona, M., et al. Over 78 000 RR Lyrae Stars in the Galactic Bulge and Disk from the OGLE Survey, 2019, Acta Astronomica, 69, 321 Soszyński, I., Udalski, A., Szymański, M. K., et al. Additional Galactic Cepheids from the OGLE Survey, 2020, Acta Astronomica, 70, 101 Pietrukowicz, P., Udalski, A., Soszyński, I., et al. Properties of the Milky Way's Old Populations Based on Photometric Metallicities of the OGLE RR Lyrae Stars, 2020, Acta Astronomica, 70, 121 Soszyński, I., Smolec, R., Udalski, A., et al. OGLE-GAL-ACEP-091: The First Known Multi-mode Anomalous Cepheid, 2020, The Astrophysical Journal Letters, 901, L25 Pietrukowicz, P., Soszyński, I., Netzel, H., et al. Over 10000 δ Scuti Stars toward the Galactic Bulge from OGLE-IV, 2020, Acta Astronomica, 70, 241 Hajdu, G., Pietrzyński, G., Jurcsik, J., et al. Studies of RR Lyrae Variables in Binary Systems. I. Evidence of a Trimodal Companion Mass Distribution, 2021, The Astrophysical Journal, 915, 50 Soszyński, I., Olechowska, A., Ratajczak, M., et al. Binarity as the Origin of Long Secondary Periods in Red Giant Stars, 2021, The Astrophysical Journal Letters, 911, L22 Iwanek, P., Soszyński, I., Kozłowski, S. Mid-infrared Period-Luminosity Relations for Miras in the Large Magellanic Cloud, 2021, The Astrophysical Journal, 919, 99 Iwanek, P., Kozłowski, S., Gromadzki, M., et al. Multiwavelength Properties of Miras, 2021, The Astrophysical Journal Supplement Series, 257, 23 Soszyński, I., Pietrukowicz, P., Skowron, J., et al. Over 24 000 δ Scuti Stars in the Galactic Bulge and Disk from the OGLE Survey, 2021, Acta Astronomica, 71, 189 Pietrukowicz, P., Soszyński, I., Udalski, A. Classical Cepheids in the Milky Way, 2021, Acta Astronomica, 71, 205 Netzel, H., Pietrukowicz, P., Soszyński, I., Wrona, M. Frequency analysis of δ Scuti stars towards the Galactic bulge, 2022, Monthly Notices of the Royal Astronomical Society, 510, 1748 Kołaczek-Szymański, P.A., Pigulski, A., Wrona, M., Ratajczak, M., Udalski, A. Tidally excited oscillations in MACHO 80.7443.1718: Changing amplitudes and frequencies, high-frequency tidally excited mode, and a decrease in the orbital period, 2022, Astronomy & Astrophysics, 659, A47 Wrona, M., Ratajczak, M., Kołaczek-Szymański, P.A., et al. The OGLE Collection of Variable Stars: One Thousand Heartbeat Stars in the Galactic Bulge and Magellanic Clouds, 2022, The Astrophysical Journal Supplement Series, 259, 16 Wrona, M., Kołaczek-Szymański, P.A., Ratajczak, M., Kozłowski, S. Photometric Analysis of the OGLE Heartbeat Stars, 2022, The Astrophysical Journal, 928, 135 Iwanek, P., Soszyński, I., Kozłowski, S., et al.The OGLE Collection of Variable Stars. Nearly 66,000 Mira stars in the Milky Way, 2022, The Astrophysical Journal Supplement Series, in press Conference proceedings Soszyński, I. Classical Pulsators in Large-Scale Optical Photometric Surveys, 2018, Proceedings of the Polish Astronomical Society, 6, 29 Soszyński, I. One Million Variable Stars from the OGLE Survey, 2018, Proceedings of the Polish Astronomical Society, 7, 168 Ratajczak, M., OGLE Collaboration, BRITE Team The Power of Eccentric Binaries, 2020, Proceedings of the Polish Astronomical Society, 10, 151 Pietrukowicz, P. Milky Way's structure based on thousands of Cepheids and RR Lyrae stars from OGLE, 2020, Proceedings of the International Astronomical Union, 253, 1 Soszyński, I. The Milky Way as Seen by the OGLE Survey, 2021, ASP Conference Series, 529, 3 Iwanek, P., OGLE Team Three-Dimensional Distributions of Type II and Anomalous Cepheids in the Magellanic Clouds Unravel the Origin of These Stars, 2021, ASP Conference Series, 529, 17 Soszyński, I. Eppur si muove... On the Origin of Long Secondary Periods in Red Giant Stars, 2022, to appear in the Proceedings of the Polish Astronomical Society