1. Ariangroup, “Bipropellant Apogee Motors,” World Wide Web location https://www.space-propulsion.com/spacecraft-propulsion/apogee-motors/, 2023.
2. Evaluating New Liquid Storable Bipropellants: Safety and Performance Assessments
3. Foust, J., “Sherpa tug starts raising orbit more than a month after launch,” World Wide Web location https://spacenews.com/sherpa-tug-yet-to-start-raising-orbit-a-month-after-launch/, 2023.
4. Momentus, “Services”, World Wide Web location https://momentus.space/services/, 2023.
5. D-orbit, “Solutions-Launch&Deployment,” World Wide Web location https://www.dorbit.space/launch-deployment, 2023.