1. Allen DC. Histopathology reporting. Guidelines for surgical cancer. 3rd ed. London: Springer; 2013.
2. Allen DC, Cameron RI. Histopathology specimens. Clinical, pathological and laboratory aspects. 2nd ed. Berlin: Springer; 2013.
3. Bosman FT, Carneiro F. WHO classification of tumours of the digestive system. 4th ed. Lyon: IARC Press; 2010.
4. Brierley JD, Gospodarowicz MK, Wittekind C, editors. TNM classification of malignant tumours. 8th ed. Oxford: Wiley-Blackwell; 2017.
5. Odze RD, Goldblum JR, editors. Odze and Goldblum Surgical pathology of the GI tract, liver, biliary tract, and pancreas. 3rd ed. Philadelphia: Elsevier Saunders; 2015.