1. P.R. Gradl, C.S. Protz, D.L. Ellis, S.E. Greene, Progress in Additively Manufactured Copper-Alloy GRCop-84, GRCop-42, and Bimetallic Combustion Chambers for Liquid Rocket Engines, in Proceedings of the 70th International Astronautical Congress (IAC), Washington D.C., 21-25 October 2019
2. P.R. Gradl, C. Protz, S.E. Greene, D. Ellis, B. Lerch, I. Locci, Development and Hot-fire Testing of Additively Manufactured Copper Combustion Chambers for Liquid Rocket Engine Applications, in Proceedings of the 53rd AIAA/SAE/ASEE Joint Propulsion Conference, Atlanta, 10-12 July 2017
3. J.K. Lee, J.H. Lee, S.P. Lee, I.S. Son, D.S. Bae, Met. Mater. Int. 20, 483 (2014)
4. C. Zeng, H. Wen, B.C. Bernard, J.R. Raush, P.R. Gradl, M. Khonsari, S.M. Guo, Manuf. Lett. 28, 25 (2021)
5. N. Liang, J. Liu, S. Lin, Y. Wang, J.T. Wang, Y. Zhao, Y. Zhu, J. Alloy. Compd. 735, 1389 (2018)