Poor relationship between arterial [lactate] and leg net release during exercise at 4,300 m altitude - Brooks, G. A.; Wolfel, E. E.; Butterfield, G. E.; Cymerman, A.; Roberts, A. C.; Mazzeo, R. S.; Reeves, J. T. (American Journal of Physiology - Regulatory, Integrative and Comparative Physiology, 1998)