Malakooty poor, E., M. Baghaban Eslaminejad, F. Bagheri, E. Mollarazi, and N. Gheibi. “Effect of Chitosan Grafted Polyethylenimine Nanoparticles As a Gene Carrier on Mesenchymal Stem Cells Viability”. Archives of Advances in Biosciences, vol. 4, no. 2, May 2013, doi:10.22037/jps.v4i2.4400.