Trudy Tretʹego Mezhdunarodnogo simpoziuma po granit͡se silura i devona i stratigrafii nizhnego i srednego devona. [V 2-kh t. - International Symposium on the Silurian-Devonian Boundary and the Stratigraphy of the Lower and Middle Devonian (3rd : 1968 : Leningrad, R.S.F.S.R. and Lʹviv, Ukraine) ("Nauka," Leningr. otd-nie, 1971)