McCallum, I. J. D.; Ong, S.; Mercer-Jones, M. (2009). "Chronic constipation in adults". BMJ338: b831. doi:10.1136/bmj.b831. பப்மெட்:19304766.
Emmanuel, A. V.; Tack, J.; Quigley, E. M.; Talley, N. J. (December 2009). "Pharmacological management of constipation". Neurogastroenterol Motil21: 41–54. doi:10.1111/j.1365-2982.2009.01403.x. பப்மெட்:19824937.
McCallum, I. J. D.; Ong, S.; Mercer-Jones, M. (2009). "Chronic constipation in adults". BMJ338: b831. doi:10.1136/bmj.b831. பப்மெட்:19304766.
Emmanuel, A. V.; Tack, J.; Quigley, E. M.; Talley, N. J. (December 2009). "Pharmacological management of constipation". Neurogastroenterol Motil21: 41–54. doi:10.1111/j.1365-2982.2009.01403.x. பப்மெட்:19824937.