Kahan, J. and Žiaková, .E. 2021. LONELINESS AND PREDICTIVE MODELS OF MULTIPLE RISK BEHAVIOR OF ADOLESCENTS IN THE CONTEXT OF ECOSYSTEM METATHEORY AND VIRTUAL INTERNET SPACE. Proceedings of CBU in Social Sciences. 2, (Oct. 2021), 172-183. DOI:https://doi.org/10.12955/pss.v2.218.