- E.T. Gitau W.S. Charlton, "Use of a Microsphere Fingerprint for Identity Verification of Fuel Pebbles in a Pebble-fueled HTGR", JNMM, 40, 2 (2012).
- E.T. Gitau, "Development and Evaluation of a Safeguards System Concept for a Pebble-fueled High Temperature Gas-cooled Reactor", M.S. Thesis, Nuclear Engineering, Texas A&M University, College Station, TX (2011).
- E.T. Gitau, W.S. Charlton, "Safeguards System Development for a Pebble-Fueled HTGR", 52nd Annual Meeting of the Institute for Nuclear Materials Management (INMM), Palm Desert, CA, July 17-21, 2011.