"Materialism and Empirio-criticism: Critical Comments on a Reactionary Philosophy (1908)". Book by Vladimir Lenin. Chapter Five: "The Recent Revolution in Natural Science and Philosophical Idealism". Collected Works, Volume 14, www.marxists.org.
"First All-Russia Congress of Working Women". Speech on November 19, 1918, published on Pravda No. 253, November 22, 1918. Collected Works, Volume 28, pages 180-182, www.marxists.org.
"Report at a Joint Session of the All-Russia Central Executive Committee, The Moscow Soviet, Factory Committees and Trade Unions". Pravda No. 229, October 23, 1918. Collected Works, Volume 28, pp. 113 - 126, www.marxists.org.