About the tool for processing of wood from Nymphaeum city-site in Eastern Crimea. Could the sarcophagus makers use the instruments made of bone? - Kasparov, A. K. (Bosporskij fenomen : pogrebal'nye pamjatniki i svjatilišča: materialy meždunarodnoj naučnoj konferencii : [pamjati Evgenija Jakovleviča Rogova (1951-2001)], 2002)