Dimitrov, Petko & Dimitar
Petko & Dimitar Dimitrov are a Bulgarian father and son team, who have written about the pre-flood Varna civilisation which they claim existed on the then exposed Black Sea plain[0998], however, they do not call it Atlantis by name. Their book is available, in English, online(a) as a pdf file.
Their book, The Black Sea, the Flood and the Ancient Myths, which supported much of Ryan & Pitman’s work. Unlike them, who based many of their conclusions on a study of molluscs, the Dimitrovs focused on sedimentation evidence. They also suggest that the Holocene influx into the Black Sea also triggered the Vedic Aryan migration to India(b).
(a) https://io-bas.bg/noahproject/BOOK_PETKO.pdf
(b) https://www.academia.edu/1293293/INITIATION_OF_THE_MIGRATION_OF_VEDIC_ARYANS_TO_INDIA_BY_A_CATASTROPHIC_FLOODING_OF_THE_FRESH_WATER_BLACK_SEA_BY_MEDITERRANEAN_SEA_DURING_THE_HOLOCENE._Yavor_Y._Shopov1_odor_Yalamov_Petko_Dimitrov_Dimitar_Dimitrov_and_Bono_Shkodrov