1. Collier, Fayette; "Environmentally Responsible Aviation - Real solutions for environmental challenges facing aviation," Report NF1676L-11223 (URL: http://ntrs.nasa.gov), GARDN,First Green Aviation Conference, Feb 2011.
2. Guynn,M.;Berton,J.;Fisher,K.;Haller,W.;Tong,M.;andThurman,D."RefinedExplorationofTurbofan DesignOptionsfor anAdvanced Single-AisleTransportAircraft," NASATM-2011-216883, Jan2011.