Brody IA (July 1969). "Muscle contracture induced by exercise. A syndrome attributable to decreased relaxing factor". The New England Journal of Medicine. 281 (4): 187–92. doi:10.1056/NEJM196907242810403. PMID4239835.
Brody IA (July 1969). "Muscle contracture induced by exercise. A syndrome attributable to decreased relaxing factor". The New England Journal of Medicine. 281 (4): 187–92. doi:10.1056/NEJM196907242810403. PMID4239835.