R. Dobrila-Dintinjana, D. Trivanovic, M. Dintinjana, J. Vukelic and N. Vanis, “Effects of Dietary Counseling on Patients with Colorectal Cancer,” In: R. Etarh, Ed., Colorectal Cancer from Prevention to Patient Care, InTech, Rijeka, pp. 211-226.
 D. Mayers, “Colon Polyps and Cancer Risk,” 2007. http://coloncancer.about.com/od/screening/a/Polyps.htm
 P. W. Carne, J. N. Frye, A. Kennedy-Smith, J. Keating, A. Merrie, E. Dennett and F. A. Frizelle, “Local Invasion of the Bladder with Colorectal Cancers: Surgical Management and Patterns of Local Recurrence,” Disease of Colon Rectum, Vol. 47, No. 1, 2004, pp. 44-47. doi:10.1007/s10350-003-0011-z
 H Ueno, C Yamauchi, K Hase, T Ichikura and H. Mochizuki, “Clinicopathological Study of Intrapelvic Cancer Spread to the Iliac Area in Lower Rectal Adenocarcinoma by Serial Sectioning,” British Journal of Surgery, Vol. 86, No. 12, 1999, pp. 1532-1537. doi:10.1046/j.1365-2168.1999.01271.x
 M. Astin, T. Griffin, R. D. Neal, P. Rose and W. Hamilton, “The Diagnostic Value of Symptoms for Colorectal Cancer in Primary Care: A Systematic Review,” The British Journal of General Practice: The Journal of the Royal College of General Practitioners, Vol. 61, No. 586, 2011, pp. 231-243.
 A. P. Wimmer, J. P. Bouffard, P. R. Storms, J. A. Pilcher, C. Y. Liang and J. J. DeGuide, “Primary Colon Cancer without Gross Mucosal Tumor: Unusual Presentation of a Common Malignancy,” Southern Medical Journal, Vol. 91, No. 12, 1998, pp. 1173-1176. doi:10.1097/00007611-199812000-00017
 K. J. d’Silva, A. J. Dwivedi, A. Shetty and S. Prakash, “An Unusual Presentation of Colon Cancer in a Young Individual,” Digestive Diseases and Sciences, Vol. 50, No. 6, 2005, pp. 1033-1035. doi:10.1007/s10620-005-2699-1
 L. K. Tumwine, M. Kagimu, P. Ocama, I. Segamwenge, N. Masiira-Mukasa, D. Wamala, O. Dworak and C. K. Opio, “Atypical Presentation of Colon Adenocarcinoma: A Case Report,” Journal of Medical Case Reports, Vol. 6, 2012, p. 58. doi:10.1186/1752-1947-6-58
 F. Cellini and V. Valentini, “Current Perspectives on Preoperative Integrated Treatments for Locally Advanced Rectal Cancer: A Review of Agreement and Controversies,” Oncology (Williston Park), Vol. 26, No. 8, 2012, pp. 730-735, 741.