Differentiation of bone marrow and umbilical cord blood mesenchymal stem cells into osteoblasts in vitro: comparison of their osteogenic potentials 
Shao Shuai, Zhou Chen-hong, Xu Li-li
Chinese Journal of Tissue Engineering Research . 2015, (23): 3652 -3657 .  DOI: 10.3969/j.issn.2095-4344.2015.23.008