Simeunović Bajić, N., and I. Ercegovac. “EUROPEAN PICTURE OF THE ELDERLY PEOPLE: RESEARCH ON THE MAIN SOCIO-DEMOGRAPHIC CHARACTERISTICS AND TRENDS IN SELECTED COUNTRIES”. Journal of the Geographical Institute “Jovan Cvijić” SASA, vol. 67, no. 3, Dec. 2017, pp. 317–331, doi:10.2298/IJGI1703317S.