A. Bendoyro, D. Thomas, J. Cassibry, and W. Emrich, "Shielding Factors for a Fission-Powered Mars Exploration Rover," Nuclear Science and Technology Open Research (NSTOR), October 2023.

Da. Nikitaeva & D. Thomas, “In-Situ Propellant Alternatives for a Lunar Ascent/Descent Vehicle,” AIAA Journal of Spacecraft and Rockets. May 2023. DOI: 10.2514/1.A35507.

S. Rawlins & D. Thomas, “Reliability Assessment of Nuclear Thermal Engine Configuration and Health Monitoring System,” Journal of the British Interplanetary Society, 76(4), April 2023. DOI: 10.59332/jbis-076-04-0145.

J. Kolligs & D. Thomas, “Alternate Media Viability for Systems Requirements,” Systems, Volume 11, Issue 4, 176. March 2023. DOI: 10.3390/systems11040176.

Da. Nikitaeva & D. Thomas, “Propulsion Alternatives for Mars Vehicle Architectures Using In-Situ Propellants,” AIAA Journal of Spacecraft and Rockets. March 2023. DOI: 10.2514/1.A35506.

Di. Nikitaeva & D. Thomas, “In-Situ Resource Utilization on the Moon for Small Modular Nuclear Reactor Production,” Journal of the British Interplanetary Society, February 2023. DOI: 10.59332/jbis-076-02-0056.

V. Lopez & D. Thomas, “Proposed metric for complexity assessment using SysML,” Aerospace. October 2022. DOI: https://doi.org/10.3390/aerospace9100612

Grumbach & D. Thomas, “Quantitative Validation of the Principles of Complex System Integration,” Systems Engineering. DOI: 10.1002/sys.21641

S. Rawlins, Y. Kim, & D. Thomas, “Feasibility of Low-Enriched Uranium Fueled Nuclear Thermal Propulsion in the Low-Thrust Region Below 16klbf,” Annals of Nuclear Energy, 179(22), December 2022. DOI: 10.1016/j.anucene.2022.109368.

J. Grumbach & D. Thomas,” Systems Integration Implications of Component Reuse” Systems Engineering. DOI: 10.1002/sys.21636.

D. Nikitaev & D. Thomas, “Impacts of In-Situ Alternative Propellant Utilization on Mars Vehicle Architectures Using Nuclear Thermal Propulsion,” AIAA Journal of Spacecraft and Rockets. DOI: 10.2514/1.A35399.

S. Kumar, D. Thomas, & J. Cassibry, “Decoding the Mission Design Problem for NTP Systems for Outer Planet Robotic Missions,” Nuclear Technology. DOI: 10.1080/00295450.2022.2096388.

D. Thomas, M. Houts, W. Walters, K. Hollingsworth, R. Frederick, & J. Cassibry, “Toward the Engineering Feasibility of the Centrifugal Nuclear Thermal Rocket,” Journal of the British Interplanetary Society, 75(5) May 2022, pp. 181-188.

D. Nikitaev & D. Thomas, Alternative Propellant NTP Vehicle Architectures, AIAA Journal of Spacecraft and Rockets. https://arc.aiaa.org/doi/10.2514/1.A35289

D. Nikitaev & D. Thomas, “Preliminary Results for In-Situ Alternative Propellants for Nuclear Thermal Propulsion,” Nuclear Technology.

S. Kumar, D. Thomas, & J. Cassibry, “Nuclear Thermal Propulsion for Jupiter and Saturn Rendezvous Missions,” AIAA Journal of Spacecraft and Rockets. February 2022. https://arc.aiaa.org/doi/10.2514/1.A35212

J. Grumbach & D. Thomas, "Integration Principles for Complex Systems," Wiley Systems Engineering, SYS-20-018.R2, September 2020. https://doi.org/10.1002/sys.21554

J. Kolligs & D. Thomas, "The Origins and Evolution of Requirements in Engineering," IEEE Systems Journal, June 2020. DOI: 10.1109/JSYST.2020.2999557

Morris, D. Thomas & K. Hollingsworth, “Stay Cool—Alternatives for Long-Term Storage of Large Quantities of Liquid Hydrogen on a Mars Transfer Vehicle,” Nuclear Technology, 2020; 207(6), pp. 860-865. https://www.tandfonline.com/doi/abs/10.1080/00295450.2020.1819157

Hydrogen on a Mars Transfer Vehicle", *Nuclear Technology*, December 2020. https://doi.org/10.1080/00295450.2020.1819157

D. Nikitaev & D. Thomas, "Seeded Hydrogen in Mars Transfer Vehicles Using Nuclear Thermal Propulsion," AIAA Journal of Spacecraft and Rockets, July 2020. https://doi.org/10.2514/1.A34722

D. Nikitaev & D. Thomas, "Seeded Hydrogen in Nuclear Thermal Propulsion Engines," AIAA Journal of Spacecraft and Rockets, April 2020. https://doi.org/10.2514/1.A34711

D. Thomas & E. Patterson, E., Systems Modeling Language viewpoint utilization to facilitate shared mental models among system stakeholders. Systems Research and Behavioral Science, 37(1), 2020, pp.128-140. https://doi.org/10.1002/sres.2610

A. Aueron, D. Thomas, & J. Cassibry, "Analytical Modeling of Radiation Attenuation and Heat Deposition in Propellant for Nuclear Thermal Rockets," AIAA Journal of Spacecraft and Rockets, March 2019. https://doi.org/10.2514/1.A34389