1. A simplified method for the determination of chromic oxide (Cr2O3) when used as an index substance;Bolin, D.W.; King, R.P.; Klosterman, E.W.;Science,1952
2. Measurement of the mean transit time of dietary residue through the human gut;Cummings, J.H.; Jenkins, D.J.A.; Wiggins, H.S.;Gut,1976
3. Usefulness of chromic oxide as an internal standard for balance studies in formula-fed patients and for assessment of colonic function;Davignon, J.; Simmonds, W.J.; Ahrens, Jr, E.H.;Journal of Clinical Investigation,1968
4. Use of barium sulphate as a continuous markerfor faeces;Dick, M.;Journalof Clinical Pathology,1967
5. Use of cuprous thiocyanate as a short-term continuous marker for faeces;Dick, M.;Gut,1969