Roberfroid, M., & Malvoisin, E. (1976). A new radiochemical assay for gamma-glutamyl transpeptidase. Its application to the analysis of the hepatic subcellular distrubition of the enzyme. Archives Internationales de Physiologie et de Biochimie, 84(3), 652-654. https://hdl.handle.net/2078.5/86192 (Original work published 1976)