Sánchez M., Suárez L., Andrés M. T., Flórez B. H., Bordallo J., Riestra S., and Cantabrana B. “Modulatory Effect of Intestinal Polyamines and Trace Amines on the Spontaneous Phasic Contractions of the Isolated Ileum and Colon Rings of Mice”. Food & Nutrition Research, vol. 61, May 2017, https://foodandnutritionresearch.net/index.php/fnr/article/view/1185.