Hardell , L. I., C.-G. Stålnacke, H. Lundqvist, P. Malmborg, and B. Långström. 1984. “Amino Acids Labelled With 11C As Indicator of the Effect of Dietary Treatment of Hyperammonaemia”. Upsala Journal of Medical Sciences 89 (3):233-43. https://doi.org/10.3109/03009738409179504.