Richard N. Aarons (Jun 22, 2017). "Unstabilized Approach?". Aviation Week Network. ATSB: When In Doubt, Go Around. Archived from the original on December 20, 2019. Retrieved October 1, 2021.
boeing.com
Garber, Ralph Michael; Van Kirk, Lawrence, "Conditional Inspection", Aero, no. 14, Boeing, archived from the original on 2021-03-01, retrieved 2021-10-01
europa.eu
essi.easa.europa.eu
Guillaume Aigoin, Characterising hard landingsArchived 2017-03-15 at the Wayback Machine / EASA EOFDM Conference, 12 January 2012, page 7: "The vertical parameter is neither vertical nor an acceleration … It is the normal load factor in the aircraft reference frame is not sufficient for assessing contact severity!"
web.archive.org
Garber, Ralph Michael; Van Kirk, Lawrence, "Conditional Inspection", Aero, no. 14, Boeing, archived from the original on 2021-03-01, retrieved 2021-10-01
Guillaume Aigoin, Characterising hard landingsArchived 2017-03-15 at the Wayback Machine / EASA EOFDM Conference, 12 January 2012, page 7: "The vertical parameter is neither vertical nor an acceleration … It is the normal load factor in the aircraft reference frame is not sufficient for assessing contact severity!"
Richard N. Aarons (Jun 22, 2017). "Unstabilized Approach?". Aviation Week Network. ATSB: When In Doubt, Go Around. Archived from the original on December 20, 2019. Retrieved October 1, 2021.