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Oftedal, Olav T. (2002). „The origin of lactation as a water source for parchment-shelled eggs”. Journal of Mammary Gland Biology and Neoplasia. 7 (3): 253—66. PMID12751890. doi:10.1023/A:1022848632125.
Lefèvre CM, Sharp JA, Nicholas KR (2010). „Evolution of lactation: ancient origin and extreme adaptations of the lactation system”. Annual Review of Genomics and Human Genetics. 11 (1): 219—238. PMID20565255. doi:10.1146/annurev-genom-082509-141806.
Vorbach C, Capecchi MR, Penninger JM (2006). „Evolution of the mammary gland from the innate immune system?”. BioEssays. 28 (6): 606—616. PMID16700061. doi:10.1002/bies.20423.
Hu, Yaoming; Meng, Jin; Clark, James M. „A New Tritylodontid from the Upper Jurassic of Xinjiang, China”. Acta Palaeontologica Polonica. 54 (3): 385—391. doi:10.4202/а.
Oftedal, Olav T. (2002). „The mammary gland and its origin during synapsid evolution”. Journal of Mammary Gland Biology and Neoplasia. 7 (3): 225—252. PMID12751889. doi:10.1023/A:1022896515287.
Oftedal, Olav T. (2002). „The origin of lactation as a water source for parchment-shelled eggs”. Journal of Mammary Gland Biology and Neoplasia. 7 (3): 253—66. PMID12751890. doi:10.1023/A:1022848632125.
Lefèvre CM, Sharp JA, Nicholas KR (2010). „Evolution of lactation: ancient origin and extreme adaptations of the lactation system”. Annual Review of Genomics and Human Genetics. 11 (1): 219—238. PMID20565255. doi:10.1146/annurev-genom-082509-141806.
Vorbach C, Capecchi MR, Penninger JM (2006). „Evolution of the mammary gland from the innate immune system?”. BioEssays. 28 (6): 606—616. PMID16700061. doi:10.1002/bies.20423.