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Андрей Евгеньевич Деревянка, Andrey E. Derevyanka. "Быстрая оценка минимального расстояния между двумя конфокальными гелиоцентрическими орбитами." Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki (2014) 144-156