Viktor Korchnoi plays chess against Karpov. News Photo - Getty Images

World Chess Championship 1978 - Wikipedia

Grandes Rivalidades do Xadrez: Karpov x Korchnoi

10 reasons the '78 Karpov – Korchnoi chess match was weirdest ever

The Dirtiest World Chess Championship EVER

Closing Gambit: 1978 Korchnoi versus Karpov and the Kremlin (2018) - IMDb

Anatoly Karpov plays against rival Viktor Korchnoi in the World Chess News Photo - Getty Images

Karpov - Korchnoi 1978 - Schachversand Niggemann

Korchnoi x Karpov – Merano 1981 – MI Mauro de Souza

Jesse February on X: 1975, Fischer refused to defend his WC title against Karpov due to his dispute over the match format. 1978, Karpov played his first WC match, beating Korchnoi. 2023

Tal, Petrosian, Spassky And Korchnoi - Annotated By Andrew Soltis (paperback) : Target