1. Abbott EA . Flatland. A romance of many dimensions. 1884. (Original edition out of print; editions available from Dover Publications and other publishers).
2. Berx G, Cleton-Jansen AM, Strumane K, de Leeuw WJ, Nollet F, van Roy F, et al. E-cadherin is inactivated in a majority of invasive human lobular breast cancers by truncation mutations throughout its extracellular domain. Oncogene 1996; 13: 1919–1925.
3. Moll R, Mitze M, Frixen UH, Birchmeier W . Differential loss of E-cadherin expression in infiltrating ductal and lobular breast carcinomas. Am J Pathol 1993; 143: 1731–1742.
4. Virchow R . Specifiker und specifisches. Virch Arch 1854; 6: 14.