Nina, A., Čadež, V. M., Bajčetić, J., Andrić, M. and Jovanović, G. (2017) “RESPONSES OF THE IONOSPHERIC D-REGION TO PERIODIC AND TRANSIENT VARIATIONS OF THE IONIZING SOLAR Lyα RADIATION”, Journal of the Geographical Institute “Jovan Cvijić” SASA, 67(3), pp. 235–248. doi: 10.2298/IJGI1703235N.