Vandewerve, G. (1981). Inhibition of Liver-glycogen Synthase Phosphatase By Calcium - New Evidence for An Interaction Between Synthase Activation and Phosphorylase-a. Biochemical and Biophysical Research Communications, 102(4), 1323-1329. https://doi.org/10.1016/S0006-291X(81)80156-8 (Original work published 1981)