Viktor Korchnoi, Sergey Dolmatov. Candidates tournament 1990-1993. Along Hoogovens Tournament, January 1991
Fotoburo De Boer
<a rel="nofollow" class="external text" href="https://hdl.handle.net/21.12102/a4a470a4-4609-a6a9-eabf-ffddbc904851">Noord-Hollands Archief</a>, NL-HlmNHA 1478 33664K00 34