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On the Motion of a 24-hour Satellite

On Some Possible Modifications in Brouwer's Theory of the General Perturbations in Rectangular Coordinates

Long Period Effects of the Ellipticity of the Earth's Equator on the Motion of Aritifical Satellites

On the General Perturbations of the Position Vectors of a Planetary System

Application of the Krylov-Bogolubov Method to Solution of the Stellar Three-body Problem

Application of Hansen's Method to the Xth Satellite of Jupiter

Computation of the Perturbation of Nearly Circular Orbits, Using a Non-sigular Set of Vectorial Elements

On the Numerical Theory of Satellites with Highly Inclined Orbits

A Discussion of Hill's Method of Secular Perturbations and Its Application to the Determination of the Zero-rank Effects in Non-singular Vectorial Elements of a Planetary Motion

On the Poincaré-von Zeipel and Brown-Shook Methods of the Elimination of the Short Period Terms from a Hamiltonian