Clinical observations in autosomal recessive spastic paraplegia in childhood and further evidence for genetic heterogeneity. - Topaloğlu,H.; Pınarlı,G.; Erdem,H.; Gücüyener,K.; Karaduman,A.; Topçu,M.; Akarsu,A.N.; Özgüç,M. (Neuropediatrics, 1998)