Cho KS, Li G, Bardell N. Towards meeting the IATA-agreed 1.5% average annual fuel efficiency improvements between 2010 and 2020: the current progress being made by U.S. air carriers. Aviation [Internet]. 2019Dec.31 [cited 2024Nov.22];23(4):123-32. Available from: https://jau.vgtu.lt/index.php/Aviation/article/view/12019