Kyrylyuk, V. 2022. About the so-called «Bug series» of the Middle Bug region (Ukrainian shield). Article 1. The evolution of views and the composition of the «Bug series». Geofizicheskiy Zhurnal. 44, 4 (Sep. 2022), 155–170. DOI:https://doi.org/10.24028/gj.v44i4.264846.