Judgement Call: Lidle accident may lead to tighter N.Y.C. flight restrictions, Aviation Week & Space Technology, May 7, 2007, pg 92 Granju, Katie (October 12, 2006).
2006년 10월 11일에 확인함.  Judgement Call: Lidle accident may lead to tighter N.Y.C. flight restrictions, Aviation Week & Space Technology, May 7, 2007, pg 92 Granju, Katie (2006년 10월 12일).