Werdnig-Hoffman Disease & Chronic Distal Spinal Muscular Atrophy with Apparent Autosomal Dom Inherit
Ann Neurol 32:404-407, Boylan,K.B.&Cornblath,D.R., 1992
Diseases of Muscles-Clinical Manifestations & Differential Diagnosis
The New Physic 263, 1967, Oct., Boshes,L., 1967