Preparation of chitosan-gelatin microspheres by spray drying technique  
Cai Jia-yu, Meng Yong-chun, Sun Shu-mao, Nan Kai-hui
Chinese Journal of Tissue Engineering Research . 2012, (16): 2917 -2921 .  DOI: 10.3969/j.issn.1673-8225.2012.16.016