Manca, Rosa, Chester Glomski, and Alessandra Pica. “Evolutionary Intraembryonic Origin of Vertebrate Hematopoietic Stem Cells in the Elasmobranch Spleen”. European Journal of Histochemistry 62, no. 4 (December 20, 2018). Accessed February 19, 2019. https://ejh.it/index.php/ejh/article/view/2987.