Christensen, H Quantitative needle electromyography during sustained maximal effort. [electronic resource] - Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology Jun 1991 - 130-8 p. digital Publication Type: Journal Article ISSN: 1050-6411 Standard No.: 10.1016/1050-6411(91)90007-R doi