Lenin: The Protest of the Thirty-One Mensheviks https://www.marxists.org/archive/lenin/works/1907/jan/25b.htm
The P.R. and the Renegade Kautsky https://marxistleninists.org/Lenin/Proletarian%20revolution%20and%20renegade%20kautsky/bourgeosi%20and%20proletarian%20democracy.htm
✊ The use of the fist as a salute by communists and antifascists is first evidenced in 1924, when it was adopted for the Communist Party of Germany's Roter Frontkämpferbund ("Alliance of Red Front-Fighters"). In reaction, the Nazi Party adopted the well-known Roman salute two years later. https://www.jstor.org/stable/27672022
PDP Report: US Imperialism and Israeli Zionism Must Immediately Halt the Aggression Against Iran! https://wapnews.org/?p=11096
Comintern Archive revolutionary literature http://ciml.250x.com/archive/literature/english/kobayashi_the_dogs_that_kill_men.html