المؤلفون: Rader, David
المساهمون: McGraw-Hill Education LLC., publisher
الإتاحة: http://accessengineeringlibrary.com/browse/schaums-outline-of-linear-algebra-fifth-edition/c9780071794565ch03#ch03lev2sec45.2.1.3
الإتاحة: http://accessengineeringlibrary.com/browse/schaums-outline-of-calculus-sixth-edition/p2001d5a99970090001#p2001d5a99970092001.4