V. V. Belet︠s︡kiĭ

• Dvizhenie sputnika otnositelʹno t︠s︡entra mass v gravitat︠s︡ionnom pole
• Motion of an artificial satellite about its center of mass (Dvizhenie iskusstvennogo sputnika otnositel no tsentra mass)
• Motion of an artificial satellite about its center of mass =
• Ocherki o dvizhenii kosmicheskikh tel
• Vlii︠a︡nie aėrodinamicheskikh sil na vrashchatelʹnoe dvizhenie iskusstvennykh sputnikov