Feyenoord in relation to Ajax. AFC-Ajax.info [online]. [cit. 2023-08-22]. Dostupné online. (anglicky)
bleacherreport.com
KILLER, Account. The Greatest Rivalries: Ajax Versus Feyenoord. Bleacher Report [online]. [cit. 2023-08-22]. Dostupné online. (anglicky)
chinadaily.com.cn
Feyenoord's Acuna hurt after attack by Ajax hooligans. www.chinadaily.com.cn [online]. [cit. 2023-08-22]. Dostupné online.
theguardian.com
SCRAGG, Steven. When Ajax didn't want Johan Cruyff he left for Feyenoord ... and won the double. The Guardian. 2016-03-25. Dostupné online [cit. 2023-08-22]. ISSN0261-3077. (anglicky)
worldcat.org
SCRAGG, Steven. When Ajax didn't want Johan Cruyff he left for Feyenoord ... and won the double. The Guardian. 2016-03-25. Dostupné online [cit. 2023-08-22]. ISSN0261-3077. (anglicky)