6Weisskopf M, NaveveD, Ruf M, et al. Therapeutic options and results following fixed atlantoaxial rotatory dislocations [ J ]. Eur Spine J, 2005, 14 (1): 61-68
7Mazzara-JT, Fielding-JW: Effect of C1-C2 rotation on canal size [J]. Clin Orthop, 1988 Dec (237): 115- 119
8Pang D, Li V: Aflantoaxial rotatory fixation: Part 1-Biomechanics of normal rotation at the atlantoaxial joint in children [J]. Neurosurgery, 2004, 55 (3): 614-626