1. U.S. Congress. Exploring the Moon and Mars: Choices for the Nation, OTA-ISC-502, (1991)
2. C. Chullen, Advanced technology infusion into a spacesuit portable life support system, in 51st International Conference on Environmental Systems, (2022). Accessed 6 Oct 2022. https://ttu-ir.tdl.org/bitstream/handle/2346/89870/ICES-2022-425.pdf?sequence=1&isAllowed=y
3. AIAA 2012-3411;C Campbell,2012
4. C. Chullen, I. Pena, K. Ganesan, H. Chen, Advanced technology infusion into spacesuit systems, in Accelerating Space Commerce, Exploration, and New Discovery (ASCEND), (AIAA, 2022). Accessed 2 Jan 2023. https://doi.org/10.2514/6.2022-4351
5. NASA. Apollo 1. Published June 2012. Accessed 7 Jan 2023. https://www.nasa.gov/mission_pages/apollo/missions/apollo1.html