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  1. Traveling waves in an evolving interstellar gas cloud
  2. Forced Keplerian orbits in the Earth–Moon system
  3. Generalized Hohmann, Bi-Parabolic and Bi-Elliptic Planar Impulsive Transfer Using Transformed Variables
  4. On the Evolution of a Primordial Interstellar Gas Cloud
  5. Structure of polytropic stars in General Relativity
  6. Patterns Formation in a Self-Gravitating Isentropic Gas
  7. Analytic solutions for Long's equation and its generalization
  8. Reply to Anonymous Referee #2
  9. Reply to Anonymous Referee \\#1
  10. Analytic Solutions for Long's Equation and its Generalization
  11. Solutions to Painleve III and other nonlinear equations by a generalized Cole-Hopf transformation
  12. Hodograph Representation of Almost Circular Satellite Orbits with Drag
  13. Time-dependent Long's equation
  14. Time dependent Long's equation
  15. A New Approach to Optimal Impulsive Transfer Near Circular Orbit