M. Rusman Ali, S. Sudrajat, and P. Iswahyudi, “ANALYSIS OF SERVICE LEVEL OF CHECK-IN OFFICERS COUNTER AGAINST PASSENGERS FLOWNESS AT EL TARI KUPANG INTERNATIONAL AIRPORT”, Int. Conf. Adv. Transp. Eng. Appl. Soc. Sci., vol. 3, no. 1, pp. 596–606, Dec. 2024.