1. Radius of convergence of Lie series for some elliptic elements

   • C. J. Cohen
   • R. H. Lyddane

   OriginalPaper Pages: 221 - 234

2. The ‘critical inclination’: Another look

   • S. Hughes

   OriginalPaper Pages: 235 - 266

3. On a four-body problem

   • Armando Majorana

   OriginalPaper Pages: 267 - 270

4. The Lyapunov characteristic exponents as indicators of stochasticity in the restricted three-body problem

   • R. Gonczi

   OriginalPaper Pages: 271 - 280

5. Combined solar radiation pressure and drag effects on the orbits of artificial satellites

   • Rodolpho Vilhena De Moraes

   OriginalPaper Pages: 281 - 292

6. Elimination of secular terms generated by the coupling of perturbations

   • S. Ferraz-Mello

   OriginalPaper Pages: 293 - 296

7. On stationary solutions of some canonical systems of differential equations

   • S. G. Zhuravlev

   OriginalPaper Pages: 297 - 315