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Petkova, K. (2018). “Value Priorities, Empathy and Guilt in Finland, Bulgaria and Portugal”. In: Helkama, K. (ed.) Values, knowledge and morality Publications of the Faculty of Social Sciences, University of Helsinki, 98 Helsinki: Helsinki University Printing House, pp. 31-44 (in collaboration).
Petkova, K. (2018). “Real-life Dilemmas in Finland and Bulgaria”. In: Helkama, K. (ed.) Values, knowledge and morality. Publications of the Faculty of Social Sciences, University of Helsinki, 98 (2018). Helsinki: Helsinki University PrintinHouse, pp. 45-47. ISSN 2343-273x (printed), ISSN 2343-2748 (PDF (in collaboration)
Petkova, K. (2018). “Socialization context and life orientation of youth”. In: Szafraniec, K. et al. (Eds.). The Me-generation in a postcollectivist space. Dilemmas in a time of transition. Berlin: Peter Lang, рр. 75–109. (in collaboration)
