1. P. Colwell, Solving Kepler’s Equation (Willman-Bell, Richmond, Virginia, 1993).
2. M. F. Subbotin, in Leonard Euler, Ed. by M. A. Lavrent’ev, A. P. Yushkevich, and A. T. Grigor’yan (Akad. Nauk SSSR, Moscow, 1958), p. 268 [in Russian].
3. L. Euler, Theoria motuum planetarum et cometarum, continens methodum facilem ex aliquot observationibus orbitas cum planetarum tum cometarum determinandi (Berolini Sumtibus Ambrosii Haude, 1744).
4. L. Euler, Leonhardi Euleri opera omnia, Ser.2, v. 28 (Turici, Basel, 1959), p. 105.
5. K. V. Kholshevnikov and L. N. Sudov, Vestn. SPb. Univ., Ser. 1, No. 4, 124 (2009).