Glycemic index of foods: a physiological basis for carbohydrate exchange. - Jenkins,D.JA.; Wolever,T.MS.; Taylor,R.H.; Barker,H.; Fielden,H.; Baldwin,J.M.; Bowling,A.C.; Newman,H.C.; Jenkins,A.L.; Goff,D.V. (Am J Clin Nutr, 1981)