Hogben, Leslie, ed. (2014). Handbook of Linear Algebra (2nd ed.). CRC Press. pp. 43–8. ISBN 978-1-4665-0729-6. 978-1-4665-0729-6
Cheon, Gi-Sang; Wanless, Ian M. (15 February 2012). "Some results towards the Dittert conjecture on permanents". Linear Algebra and Its Applications. 436 (4): 791–801. doi:10.1016/j.laa.2010.08.041. hdl:1885/28596. https://doi.org/10.1016%2Fj.laa.2010.08.041
Eric R. Dittert at the Mathematics Genealogy Project https://mathgenealogy.org/id.php?id=81909
Bruce Edward Hajek at the Mathematics Genealogy Project https://mathgenealogy.org/id.php?id=14723
Hogben, Leslie, ed. (2014). Handbook of Linear Algebra (2nd ed.). CRC Press. pp. 43–8. ISBN 978-1-4665-0729-6. 978-1-4665-0729-6
Cheon, Gi-Sang; Wanless, Ian M. (15 February 2012). "Some results towards the Dittert conjecture on permanents". Linear Algebra and Its Applications. 436 (4): 791–801. doi:10.1016/j.laa.2010.08.041. hdl:1885/28596. https://doi.org/10.1016%2Fj.laa.2010.08.041