Feasibility of nano-hydroxyapatite/chitosan/calcium sulphate hemihydrate as an injectable bone tissue engineering scaffold  
Xue Zhen, Niu Li-yuan, An Gang, Guo Ya-shan, Lv Song-cen
Chinese Journal of Tissue Engineering Research . 2015, (8): 1160 -1164 .  DOI: 10.3969/j.issn.2095-4344.2015.08.003