1. Bonduelle M: Amyotrophic lateral sclerosis. In: Vinten PJ, Gruyn GW (eds.) Handbook of Clinical Neurology, Amsterdam: North Holland Publishers, 1975, pp. 281?338
2. Mulder DS: The Diagnosis and Treatment of Amyotrophic Lateral Sclerosis, Boston: Houghton Mifflin, 1980
3. Tandan R, Bradley WG: Amyotrophic lateral sclerosis: part 1: Clinical features, pathology, and ethical issues in management. Ann Neurol 18:271?280, 1985
4. Rosen AD: Amyotrophic lateral sclerosis: clinical features and prognosis. Arch Neurol 35:638?642, 1978
5. Rowland LP: Motor neuron diseases: the clinical syndromes. In: Mulder DW (ed.): The Diagnosis and Treatment of Amyotrophic Lateral Sclerosis. Boston: Houghton Mifflin, 1980, pp 7?33