Ia. Gerasimov et al., The construction of the theory of motion for solar-system bodies based on a universal method for the perturbative function calculation, SOL SYST R, 34(6), 2000, pp. 509-516
A new universal method for series expansion of the perturbative function is
developed. A unified theory of motion for Solar-System bodies is construct
ed on its basis. in the first part of the work, the right-hand sides of equ
ations are Limited by the first-order terms.