article: The Protopopovs
links: World Figure Skating Championships Winter Olympic Games Lake Placid, New York Olympic Games Dick Button Oleg Protopopov Switzerland Igor Moskvin European Figure Skating Championships Sovetsky Sport 1960 Winter Olympics Grindelwald 2006 Winter Olympics 1968 Winter Olympics Time (magazine) Encyclopædia Britannica 1964 Winter Olympics Russia Ludmila Belousova Soviet Union