1. Anzei N (1939) Four cases with radiculomyelopathy due to hypertrophic changes of the ligamentum flavum (in Japanese). J Jpn Ortho Ass 13: 305–316
2. Hiraoka S (1955) The ossification of the ligamentum flavum of the spinal foramena (in Japanese). Geka no Ryoiki 3: 6–11
3. Koizumi M (1962) Three cases of spinal cord paralysis proved by ligamenta flava ossification (in Japanese). Rinsho-Geka 17: 1181–1188
4. Machida H, Kurokawa T, Tanaka H, Tsuyama N (1981) Correlation between ossification of the posterior longitudinal ligament of the cervical spine and ossification of the ligamentum flavum (in Japanese). Seikei Saigai Geka 24: 185–189
5. Nagashima C (1975) Myelopathy due to ossification of the posterior longitudinal and the yellow ligament (in Japanese). Saigai Igaku, 18: 671–683