Kihno, A. “The Work "What Is Yoga?" By P. D. Ouspensky and Sri Aurobindo Ghosh’s Philosophy of Integral Yoga (the Comparative Analysis)”. Multiversum. Philosophical Almanac, no. 5-6, Nov. 2019, pp. 104-15, doi:10.35423/2078-8142.2019.5-6.08.