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Green DW, Mogekwu N, Scher DM, Handler S, Chalmers P, Widmann RF (2009). "A modification of Klein's Line to improve sensitivity of the anterior-posterior radiograph in slipped capital femoral epiphysis". J Pediatr Orthopedics. 29 (5): 449–453. doi:10.1097/BPO.0b013e3181aa20cd. PMID19568015. S2CID25529620.
Klein A, Joplin RJ, Reidy JA, Hanelin J (1952). "Slipped capital femoral epiphysis; early diagnosis and treatment facilitated by normal roentgenograms". J Bone Joint Surg Am. 34 A: 233–239. doi:10.2106/00004623-195234010-00033. PMID14907813.
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Matava MJ, Patton CM, Luhmann S, et al. (1999). "Knee pain as the initial symptom of slipped capital femoral epiphysis: an analysis of initial presentation and treatment". J Pediatr Orthop. 19 (4): 455–460. doi:10.1097/01241398-199907000-00007. PMID10412993.
Green DW, Mogekwu N, Scher DM, Handler S, Chalmers P, Widmann RF (2009). "A modification of Klein's Line to improve sensitivity of the anterior-posterior radiograph in slipped capital femoral epiphysis". J Pediatr Orthopedics. 29 (5): 449–453. doi:10.1097/BPO.0b013e3181aa20cd. PMID19568015. S2CID25529620.