Culture and identification of human umbilical vein endothelial cells in vitro using Trypsin digestion method 
Bai Yan-hui1, Zhang Ming-chang1, Bian Fang2
Chinese Journal of Tissue Engineering Research . 2012, (15): 2695 -2698 .  DOI: 10.3969/j.issn.1673-8225.2012.15.008