Tsolova, G., A. Manolova, P. Dimitrov, A. Dimitrova, M. Strandzheva, and K. Evstatieva. “Behavioral Health Risk Factors Among School Children Aged 14-18”. International Journal For Research In Health Sciences And Nursing, vol. 2, no. 3, Mar. 2016, pp. 79-92, doi:10.53555/hsn.v2i3.291.