Vertebral Artery Occlusion Complicating Yoga ExercisesArch Neurol 34:574, Hanus,S.H.,et al, 1977
Thromboangiitis Obliterans CerebriEdited by, Vinken, E. , Handbook Clinical Neurol 12:3842., Bernsmeier,A.&Held,K., 1972