1. Horowitz, M, Akkermans LMA: Scintigraphic measurement of gastric emptying.In Gastrointestinal Motility: Which Test? NW Read (ed). Petersfield, Wrightson Biomedical, Publ Ltd, 1989, pp 73–79
2. Sijp van der JRM, Kamm MA, Nightingale JMD, Britton KE, Granowska M, Akkermans LMA, Lennard-Jones JE: Disturbed gastric and small bowel transit in severe idiopathic constipation. Dig Dis Sci 38:873–844, 1993
3. Edelbroek M, Horowitz M, Maddox A, Bellen J: Relationship of gastric emptying and intragastric distribution of oil to that of aqueous liquid and digestible solid meal components. J Nucl Med 33:1283–1290, 1992
4. Collins PJ, Horowitz M, Shearman DJC, Chatterton BE: Correction for tissue attenuation in radionuclide gastric emptying studies: a comparison of a lateral image method and a geometric mean method. Br J Radiol 61:12–18, 1988
5. Jacobs F, Akkermans LMA, Yoe OH, Hoekstra A, Wittebol P: A radioisotopic method to quantify the function of the fundus, antrum and their contractile activity in gastric emptying of a semi-solid and solid meal.In Motility of the Digestive Tract. M Wienbeck (ed). New York, Raven Press, 1982, pp 233–240