Journal Papers
McConaghy, T. Troy, Debban, Theresa J., Petropoulos, Anastassios E., and Longuski, James M., "Design and Optimization of Low-Thrust Trajectories with Gravity Assists," Journal of Spacecraft and Rockets, Vol. 40, No. 3, May–June 2003, pp. 380–387.
McConaghy, T. Troy, Longuski, James M., and Byrnes, Dennis V., "Analysis of a Class of Earth-Mars Cycler Trajectories," Journal of Spacecraft and Rockets, Vol. 41, No. 4, July–August 2004, pp. 622–628.
McConaghy, T. Troy, Russell, Ryan P., and Longuski, James M., "Toward a Standard Nomenclature for Earth-Mars Cycler Trajectories," Journal of Spacecraft and Rockets, Vol. 42, No. 4, July–August 2005, pp. 694–698.
Chen, K. Joseph, McConaghy, T. Troy, Landau, Damon F., Longuski, James M., Aldrin, Buzz , "A Powered Earth-Mars Cycler with Three Synodic-Period Repeat Time,” Journal of Spacecraft and Rockets, Vol. 42, No. 5, September–October 2005, pp. 921–927.
McConaghy, T. Troy, Landau, Damon F., Yam, Chit Hong, and Longuski, James, M., "Notable Two-Synodic-Period Earth-Mars Cycler," Journal of Spacecraft and Rockets, Vol. 43, No. 2, March–April 2006, pp. 456–465.
If you want copies of Troy's journal papers, contact him and he'll see what he can do.
Conference Papers
McConaghy, T. Troy, Debban, Theresa J., Petropoulos, Anastassios E., and Longuski, James M., "An Approach to Design and Optimization of Low-Thrust Trajectories with Gravity Assists," AAS/AIAA Astrodynamics Specialist Conference, AAS Paper 01–468, Quebec City, QC, Canada, July–August 2001. [PDF]
Debban, Theresa J., McConaghy, T. Troy, and Longuski, James M., "Design and Optimization of Low-Thrust Gravity-Assist Trajectories to Selected Planets," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2002-4729, Monterey, CA, August 2002. [PDF]
McConaghy, T. Troy, Longuski, James M., and Byrnes, Dennis V., "Analysis of a Broad Class of Earth-Mars Cycler Trajectories," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2002-4420, Monterey, CA, August 2002. [PDF]
Byrnes, Dennis V., McConaghy, T. Troy, and Longuski, James M., "Analysis of Various Two Synodic Period Earth-Mars Cycler Trajectories," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2002-4423, Monterey, CA, August 2002. [PDF]
Chen, Joseph K., Landau, Damon F., McConaghy, T. Troy, Okutsu, Masataka, and Longuski, James M., and Aldrin, Buzz, "Preliminary Analysis and Design of Powered Earth-Mars Cycling Trajectories," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2002-4422, Monterey, CA, August 2002. [MS Word DOC]
Chen, Joseph K., McConaghy, T. Troy, Okutsu, Masataka, and Longuski, James M., "A Low-Thrust Version of the Aldrin Cycler," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2002-4421, Monterey, CA, August 2002. [PDF]
McConaghy, T. Troy, Yam, Chit Hong, Landau, Damon F., and Longuski, James M., "Two-Synodic Period Earth-Mars Cyclers with Intermediate Earth Encounter," AAS/AIAA Astrodynamics Specialist Conference, AAS Paper 03-509, Big Sky, MO, August 2003. [PDF]
Chen, Joseph K., McConaghy, T. Troy, Landau, Damon F., and Longuski, James M., "A Powered Earth-Mars Cycler with Three Synodic-Period Repeat Time," AAS/AIAA Astrodynamics Specialist Conference, AAS Paper 03-510, Big Sky, MO, August 2003. [MS Word DOC]
Yam, Chit Hong, McConaghy, T. Troy, Chen, Joseph K., and Longuski, James M., "Preliminary Design of Nuclear Electric Propulsion Missions to the Outer Planets," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2004-5393, Providence, RI, August 2004. [MS Word DOC]
McConaghy, T. Troy, and Longuski, James M., "Parameterization Effects on Convergence when Optimizing a Low-Thrust Trajectory with Gravity Assists," AIAA/AAS Astrodynamics Specialist Conference, AIAA Paper 2004-5403, Providence, RI, August 2004. [PDF]
Yam, Chit Hong, McConaghy, T. Troy, Chen, K. Joseph, and Longuski, James M., "Design of Low-Thrust Gravity-Assist Trajectories to the Outer Planets,” 55th International Astronautical Congress, IAC-04-A.6.02, Vancouver, BC, Canada, October 2004. [PDF]