Bontemps, F., Van den Berghe, G., & Hers, HG. (1983). Evidence for a Substrate Cycle Between Amp and Adenosine in Isolated Hepatocytes. National Academy of Sciences. Proceedings, 80(10), 2829-2833. https://doi.org/10.1073/pnas.80.10.2829 (Original work published 1983)