Subchondral fractures in adult femoral head necrosis: Comparison study of radiography, computer tomography, magnetic resonance imaging and pathological results 
Liu Chun-hong, Du Tie-qiao, Dong Jie, Li Hai-mei, Zhang Yu
Chinese Journal of Tissue Engineering Research . 2010, (13): 2353 -2356 .  DOI: 10.3969/j.issn.1673-8225.2010.13.019