Sextant system fixation for the repair of lumbar fracture: ratio of anterior to posterior border height of the injured vertebra and kyphosis Cobb angle 
Liu Cheng-jun, Gu Zu-chao, Zhang Yu
Chinese Journal of Tissue Engineering Research . 2015, (4): 548 -553 .  DOI: 10.3969/j.issn.2095-4344.2015.04.010