Source:
American Journal of Physiology: Cell Physiology. Feb2001, Vol. 280 Issue 2, pC309. 8p. 4 Black and White Photographs, 1 Diagram, 2 Charts, 6 Graphs.
Source:
Journal of Applied Physiology; Jan2003, Vol. 94 Issue 1, p314-324, 11p, 6 Color Photographs, 12 Black and White Photographs, 2 Charts, 8 Graphs