1. Bernhardt, P.A., Zinn, J., Mendillo, M., and Baumgardner, J., 1982. Modification of the upper atmosphere in chemicals found in rocket exhaust. paper presented at 20th Aerospace Science Meeting, Am. Inst. of Aeronaut. and Astronaut., Orlando, Fla., Jan. 11-14. doi:10.2514/6.1982-145.
2. Incoherent scatter measurements of ring-ion beam distributions produced by space shuttle exhaust injections into the ionosphere;Bernhardt;J. Geophys. Res.,2004
3. Artificial disturbances of the ionosphere over the Millstone Hill Incoherent Scatter Radar from dedicated burns of the space shuttle orbital maneuver subsystem engines;Bernhardt;J. Geophys. Res.,2005
4. Depletion of the F2 region ionosphere and protonosphere by the release of molecular hydrogen;Bernhardt;Geophys. Res. Lett.,1975
5. Bernhardt, P.A., 1976. The response of the ionosphere to the injection of chemically reactive vapors, Tech. Rep. 17, Stanford Electron. Lab., Stanford Univ., Stanford, Calif. https://ntrs.nasa.gov/citations/19760021631.