Averianov, A.; Skutschas, P. (2000). "A eutherian mammal from the Early Cretaceous of Russia and biostratigraphy of the Asian Early Cretaceous vertebrate assemblages". Lethaia. 33 (4): 330–340. doi:10.1080/002411600750053899.
Arratia, G. (2000). "New teleostean fishes from the Jurassic of southern Germany and the systematic problems concerning the 'pholidophoriforms'". Paläontologische Zeitschrift. 74 (1–2): 113–143. doi:10.1007/BF02987957. S2CID85256810.
Arratia, G. (2000). "New teleostean fishes from the Jurassic of southern Germany and the systematic problems concerning the 'pholidophoriforms'". Paläontologische Zeitschrift. 74 (1–2): 113–143. doi:10.1007/BF02987957. S2CID85256810.