Godfraind, T., Depover, A., & Lutete, DNT. (1980). Identification With Potassium and Vanadate of 2 Classes of Specific Ouabain Binding-sites in a (na+ + K+) Atpase Preparation From the Guinea-pig Heart. Biochemical Pharmacology, 29(8), 1195-1199. https://doi.org/10.1016/0006-2952(80)90418-9 (Original work published 1980)