Serum amino acid concentrations in nine athletes before and after the 1993 Colmar ultra triathlon - Lehmann, M.; Huonker, M.; Dimeo, F.; Heinz, N.; Gastmann, U.; Treis, N.; Steinacker, J. M.; Keul, J.; Kajewski, R.; Haussinger, D. (International Journal of Sports Medicine, 1995)