1. NERVA Verification Plan: Preliminary (Technical Report No. T102-Cp090290-F1);Aerojet-General Corporation,1970
2. NERVA Test Program Plan: Preliminary (Technical Report No. T101-Cp090290-F1);Aerojet-General Corporation,1970
3. Space nuclear thermal propulsion tests, nuclear propulsion technical exchange meeting;Allen,1993
4. Space Nuclear Thermal Propulsion Test Facilities Subpanel Final Report (Technical Report No. NASA-TM-105708);Allen,1993
5. Niobium carbide as a technology demonstrator of ultra‐high temperature ceramics for fully ceramic microencapsulated fuels;Ang;Int. J. Ceram. Eng. Sci.,2019