PÎRJOL, . P., and A.-M. . CHISEGA-NEGRILĂ. “ASPECTS REGARDING THE USE OF PASSIVE SENSORS ON AIR SURVEILLANCE MISSIONS”. BULLETIN OF "CAROL I" NATIONAL DEFENCE UNIVERSITY, vol. 9, no. 1, Mar. 2020, pp. 14-19, doi:10.12753/2284-9378-20-02.