Pushkin 1990. [Bryozoa of the family Ceramoporidae of Ordovician from the eastern European platform.] Velichkevich, F.Yu.[Ed]. Novye predstaviteli iskopaemoi fauny i flory Belorussii i drugikh raionov SSSR: sbornik nauchnykh trudov. [New representatives of the fossil fauna and flora of Belorussia and other regions of the USSR: collected scientific papers.], Nauka i Tekhnika, Minsk, 1990: 34-50. Chapter pagination: 5-34