Keba, Ruslan, and Anatolii Kulabukhov. “Optimization Problem of the Launch Vehicle Pitch Angle During Spacecraft Insertion into Circular Orbits”. Challenges and Issues of Modern Science 4, no. 1 (June 24, 2025): 89–93. Accessed July 12, 2025. https://cims.fti.dp.ua/j/article/view/289.