1. Johnson, P. and Rising, P.A. (1978): Techniques for Assesment of Biliary Excretion and Enterohepatic Circulation in the Rat. Xenobiotica8, 27–36.
2. Herrera, S., Kemp. D., Tsukamoto, M., Woodward, E. and Dragstedt, L. (1968): A New Cannula for the Study of Pancreatic Function. J. Appl. Physiol.25, 207–209.
3. Illing, H.P.A. and Fromson, J.M. (1978): Disposition and Metabolism of 6,11 Dihydro-11-oxodibenz (b,e)-oxepin-2-acetic acid in Rat, Dog, Rabbit, Rhesus Monkey and Man. Drug Metab. Disp.6, 510–517.
4. Johnson, P., Rising, T.J. and Rising, P.A. (1972): Liquid Scintillation Counting of Biological Samples using External Standardisation and Automatic Data Processing in “Liquid Scintillation Counting”. (Ed. Crook, M.A., Johnson, P. Scales, B.) Heyden, London. Vol 2, 267–277.
5. Scheline, R.R. (1968): Metabolism of Phenolic Acids by the Rat Intestinal Microflora. Acta Pharmacol. Toxicol.26, 189–205.