[1] Shortly before the 1981 martial law crisis in Poland, Yankov sent out a seven-page samizdat letter "A Letter to Russian Workers about the-Events in Poland".
In it, he encouraged the Soviet working class to follow the example of Solidarity, stressing social participation and non-violent protest.
He served his time in Dubravlag labor camp in Mordovia, near Moscow, and his exile in Buryatia in south-central Siberia.
[4] Yankov is featured as a prominent character in Levan Berdzenishvili's novel Sacred Darkness, describing their joint time in prison.
[5] After 1991, he taught mathematics and philosophy at the Department of Intellectual Systems at Russian State University for the Humanities in Moscow.