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Alekseev S.N., Repin Yu.S. (1990). Особенности морфогенеза некоторых триасовых бореальных аммоноидей [= The peculiarities of the morphogenesis of some Triassic boreal Ammonoidea]. Ezhegodnik Vsesoyuznogo Paleontologicheskogo Obshchestva. 33: 106-118.
Alekseev S.N., Repin Yu.S. (1990). Особенности морфогенеза некоторых триасовых бореальных аммоноидей [= The peculiarities of the morphogenesis of some Triassic boreal Ammonoidea]. Ezhegodnik Vsesoyuznogo Paleontologicheskogo Obshchestva. 33: 106-118.