"Speech Delivered in the Name of the R.S.D.L.P. at The Funeral of Paul and Laura Lafargue November 20 (December 3), 1911". Lenin. in: Lenin, Vladimir (1974). Collected Works (Volume: 17), December 1910-April 1912 (1st edición). Moscow: Progress Publishers. pp. 304-305.; also for transcribed edition: Marxists