Huijing, P. A., Adelerhof, A. S., Griesbergen, R., Woittiez, R. D., & Rijnsburger, W. H. (1986). Triceps surae E.M.G. power spectrum changes during sustained submaximal isometric contractions at different muscle length. Electromyography and clinical Neurophysiology, 26, S. 181-192.

Huijing, Peter A., Anja S.P Adelerhof, Rian Griesbergen, Reinout D. Woittiez, and Wim H. Rijnsburger. "Triceps Surae E.M.G. Power Spectrum Changes During Sustained Submaximal Isometric Contractions At Different Muscle Length." Electromyography and Clinical Neurophysiology 26 (1986): S. 181-192.

Huijing, Peter A., et al. "Triceps Surae E.M.G. Power Spectrum Changes During Sustained Submaximal Isometric Contractions At Different Muscle Length." Electromyography and Clinical Neurophysiology 26 (1986): S. 181-192.