Tena, E. et al. 2013. Possible Superfetation in a Female nzb Rabbit. (Oryctolagus cuniculus) Accompanying Intrauterine Development Delay (idd). Spei Domus. 9, 19 (Dec. 2013), 49–56. DOI:https://doi.org/10.16925/sp.v9i19.709.