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Yury Filippovich Golubev, Alexey Vasilyevich Grushevskii, Irina Petrovna Kiseleva, Victor Vladimirovich Korianov, Sergey Mikhailovich Lavrenov, Andrey Georgievich Tuchin, Denis Andreevich Tuchin. "Mission Design for Venusian Projects of the 2021-2028 Years Epoch. Launch Windows." Keldysh Institute Preprints (2018) 1-32