(法语). with the denomination pseudo-anneau de carré nul For example Warner, Seth. Modern Algebra 1. Courier Dover. 1990: 188. ISBN 0-486-66341-8. Zariski
Seth Grahame-Smith!!. Ain't It Cool News. 2012-05-17 [2013-07-02]. (原始内容存档于2012-05-22). Ryan Turek. Michael Keaton Meets About Beetlejuice 2, Seth Grahame-Smith