Oran O, Demirsoy S, Oğuz A, Cağlar M, Karan A, Yilgör E. GM1 gangliosidosis type I (Norman-Landing disease) (report of a case with enzymatic analysis of the family). Turk J Pediatr. 1980;22(3-4):59-64. Accessed April 30, 2026. https://turkjpediatr.org/article/view/4151