With the process of de-Stalinization after Stalin's death, the lyrics referring to him were considered unacceptable, and from 1956 to 1977 the anthem was performed without lyrics. A notable exception took place at the 1976 Canada Cup ice hockey tournament, where singer Roger Doucet insisted on performing the anthem with lyrics after consultations with Russian studies scholars from Université de Montréal and Soviet team officials. In 1977, to coincide with the 60th anniversary of the October Revolution, revised lyrics, written in 1970 by original author Sergey Mikhalkov, were adopted. The varying refrains were replaced by a uniform refrain after all stanzas, and the line praising Stalin was dropped, as were the lines referring to the Great Patriotic War. Another notable change was the replacement of a line referring to the Soviet national flag with one citing the Communist Party of the Soviet Union in the form of "Partiya Lenina" ("The party of Lenin"). These lyrics were also present in the original party anthem at the same place in the melody, but followed by the lyrics "Partiya Stalina" ("The party of Stalin").