Hall, 2015, p. 63;Ramsleya y Heada, 2017, pp. 7-24 Ramsleya, Kenneth R.; Heada, James W. (2017). «The Stickney Crater ejecta secondary impact crater spike on Phobos: Implications for the age of Stickney and the surface of Phobos». Planetary and Space Science138: 7-24. doi:10.1016/j.pss.2017.02.004.
Ramsleya y Heada, 2017, pp. 7-24. Ramsleya, Kenneth R.; Heada, James W. (2017). «The Stickney Crater ejecta secondary impact crater spike on Phobos: Implications for the age of Stickney and the surface of Phobos». Planetary and Space Science138: 7-24. doi:10.1016/j.pss.2017.02.004.