Femoral histology and growth patterns of the ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of Western Siberia / P. P. Skutschas, S. S. Morozov, A. O. Averianov [et al.] // Acta Palaeontologica Polonica. 2021. Vol. 66, № 2. P. 437-447. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000894744