D. M. Surgenor, L. E. Strong, H. L. Taylor, R. S. Gordon, D. M. Gibson,
The separation of choline esterase, mucoprotein, and metal-combining protein into subfractions of human plasma. Journal of the American Chemical Society. ,vol. 71, pp. 1223- 1229 ,(1949) ,
10.1021/JA01172A025