(en) Maturing the M10A 25,000lbf Liquid Oxygen/Methane Broadsword Engine, Space Technology Mission Directorate, (lire en ligne)
doi.org
dx.doi.org
Joel Scotkin, David Masten, Jonathan Powers et Nathan O'Konek, « Experimental Enhanced Upper Stage (XEUS): An affordable large lander system », 2013 IEEE Aerospace Conference, , p. 1–9 (DOI10.1109/AERO.2013.6497179, lire en ligne, consulté le )
ieee.org
ieeexplore.ieee.org
Joel Scotkin, David Masten, Jonathan Powers et Nathan O'Konek, « Experimental Enhanced Upper Stage (XEUS): An affordable large lander system », 2013 IEEE Aerospace Conference, , p. 1–9 (DOI10.1109/AERO.2013.6497179, lire en ligne, consulté le )
issn.org
portal.issn.org
(en-US) Jason Paur, « Xoie Claims $1 Million Lunar Lander Prize », Wired, (ISSN1059-1028, lire en ligne, consulté le )
(en-US) Jason Paur, « Masten Space Systems Loses Rocket After Record Flight », Wired, (ISSN1059-1028, lire en ligne, consulté le )
(en) Tricia Talbert, « NASA - Masten and Armadillo Claim Lunar Lander Prizes », sur www.nasa.gov (consulté le ) : « In the Level One competition, Armadillo Aerospace previously claimed the first place prize of $350,000 in 2008. Masten Space Systems qualified for the remaining second place prize on Oct. 7, 2009 with an average landing accuracy of 16 cm. There were no other qualifying Level One flights this year and so the Masten team will receive the second place prize of $150,000. »
(en) Tricia Talbert, « NASA - Masten and Armadillo Claim Lunar Lander Prizes », sur www.nasa.gov, (consulté le ) : « With only a few days remaining in the 2009 competition period, Masten Space Systems of Mojave, California successfully met the Level Two requirements for the Centennial Challenges - Lunar Lander Challenge and by posting the best average landing accuracy, won the first place prize of $1,000,000.The flights were conducted with their “Xoie” (XA-0.1E) vehicle on Oct. 30 at the Mojave Air and Space Port. Armadillo Aerospace, the long-time leader in Lunar Lander Challenge efforts, was the first team to qualify for the Level Two prize with successful flights on Sept. 12 in Caddo Mills, Texas. The average landing accuracy determines which teams will receive first and second place prizes. The average accuracy for Armadillo Aerospace flights was 87 cm. but the Masten team achieved an accuracy of 19 cm, moving them into first place. Armadillo Aerospace will receive the $500,000 second place prize. »