ÅGREN , G. and RONQUIST , G. 1976. Phosphorylation of Endogenous Membrane Proteins by Endogenous Protein Kinase at the Outer Surface of Ehrlich Cells. Upsala Journal of Medical Sciences. 81, 3 (Sept. 1976), 129–134. DOI:https://doi.org/10.3109/03009737609179035.