1.
Simon E, Saur F, Buerge M, Glaab R, Roos M. Inter-observer agreement of ultrasonographic measurement of alpha and beta angles and the final type classification based on the Graf method. Swiss Med Wkly [Internet]. 2004 Nov. 13 [cited 2024 Aug. 4];134(4546):671-7. Available from: https://smw.ch/index.php/smw/article/view/434