• Bas van der Valk
    Retrieved 26 June 2018. "ATP/WTS: Ordina Open". Tulsa World. 18 June 2002. Retrieved 26 June 2018. "Schruff wint toernooi van Alphen". NU.nl (in Dutch)...
    2 KB (202 words) - 10:36, 7 April 2022