enKnuth, Donald E. (), The Art of Computer Programming, Volume 3: Sorting and Searching, Reading, Mass.: Addison-Wesley, pp. 48, 65, MR0445948.
en Zagier, D. (), „A one-sentence proof that every prime p≡ 1 (mod 4) is a sum of two squares”, American Mathematical Monthly, 97 (2): 144, doi:10.2307/2323918, JSTOR2323918, MR1041893.
en Zagier, D. (), „A one-sentence proof that every prime p≡ 1 (mod 4) is a sum of two squares”, American Mathematical Monthly, 97 (2): 144, doi:10.2307/2323918, JSTOR2323918, MR1041893.
jstor.org
en Zagier, D. (), „A one-sentence proof that every prime p≡ 1 (mod 4) is a sum of two squares”, American Mathematical Monthly, 97 (2): 144, doi:10.2307/2323918, JSTOR2323918, MR1041893.