Vasiliev, I. Yu., and Ya. V. Tkachenko. “Comparative Effectiveness of Throttled and Relay Rocket Engines for Low-Gravity Near-Earth Flights”. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics, no. 2 (April 17, 2019): 46–51. Accessed October 24, 2026. https://bphm.knu.ua/bphm/article/view/91.