1. DRAIM, J. and CASTIEL, D. “Optimization of the Borealis and the Concordia Sub-Constellations of the Ellipso Mobile Communications System,” Paper IAF-96-A.1.01 presented at the 47th International Astronautical Congress, Beijing, China, October 7–11, 1996.
2. DRAIM, J. and DAVIDSON, C. “The Ellipso System–An Optimal Solution for the Canadian Mobile Satellite Communications Market,” Proceedings, International Mobile Satellite Conference, pp. 76–81, Ottawa, Ontario, Canada, June 16–18, 1999.
3. DRAIM, J. “Elliptical-Orbit MEO Constellations: A Cost-Effective Approach for Multi-Satellite Systems,” Paper IAF-95-M.4.05 presented at the 46th International Astronautical Congress, Oslo, Norway, October 2–6, 1995.
4. PROULX, R., SMITH, J., DRAIM, J. and CEFOLA, P. “Ellipso GEAR Array–Coordinated Elliptical/Circular Constellations,” presented as AIAA paper 98-4383 at the AIAA/AAS Astrodynamics Specialist Conference, Boston, MA, August 10–12, 1998.
5. SABOL, C.A., DRAIM, J. and CEFOLA, P. “Refinement of a Sun-Synchronous, Critically Inclined Orbit for the ELLIPSO™ Personal Communication System,” The Journal of the Astronautical Sciences, Vol. 44, No. 4, Oct–Dec 1996, pp. 467–489.