1. Blood ammonia;Conway, E.J.; Cooke, R.;Biochemical Journal,1939
2. An ion-exchage method for plasma ammonia concentration;Dienst, S.G.;Journal of Laboratory and Clinical Medicine,1961
3. Improved method for the estimation of plasma ammonia by ion-exchange;Fenton, J.C.B.; Williams, A.H.;Journal of Clinical Pathology,1968
4. Rapid determination of plasma ammonia by the ion-exchange technique;Forman, D.T.;Clinical Chemistry,1964
5. New method for microdetermination of blood ammonia by use of cation exchange resin;Hutchinson, J.H.; Labby, D.H.;Journal of Laboratory and Clinical Medicine,1962