O. LJUNGSTRÖM, L. BERGLUND, G. HJELMQUIST, E. HUMBLE, and L. ENGSTRÖM, “Cyclic 3′,5′-AMP-Stimulated and Non-stimulated Phosphorylation of Protein Fractions from Rat-liver Cell Sap on Incubation with (γ-32P)ATP”, ujms, vol. 79, no. 3, pp. 129-137, Sep. 1974.