1. Aziz S.H. & Khatra G.S. 1985. Quantitative morphological study on liver and gall bladder of sheep. J. Res. Punjab. Agric. Univ. 22: 753–756.
2. Becker J.M., Duff W.M. & Moody F.G. 1981. Myoelectric control of gastrointestinal and biliary motility: a review. Surgery 89: 466–477. PMID: 7010653
3. Buéno L. & Praddaude F. 1979. Electrical activity of the gallbladder and biliary tract in sheep and its relationships with antral and duodenal motility. Ann. Biol. Anim. Biochem. Biophys. 19: 1109–1121. DOI: https://doi.org/10.1051/rnd:19790711
4. Dodds W.Y., Hogan W.J. & Geenen J.E. 1989. Motility of the bilary system, Chapter 28, pp. 1055–1101. In: Schultz S.G. (ed.), Handbook of Physiology. The Gastrointestinal System, American Physiological Society, Bethesda, 1906 pp. ISBN: 0195207912, 9780195207910
5. Fioramonti J. & Hubert M.-F. 1980. Motor function of the large intestine in sheep versus cattle. Ann. Rech. Vét. 11: 109–115. PMID: 7436326