1. 1. UNICEF. [Early childhood development. Bulgaria, 2013]. Bulgarian. [cited 2019 Mar 14]. Available from: https://www.unicef.bg/mobile/bg/themes/view/slug/31
2. 2. Atanasova Z, Miteva K. [Role Playing - a prerequisite for mastering communicative skills and patterns of behaviour among medical professionals]. Science and Technologies. 2011;1(1):229-33. Bulgarian.
3. 3. Dimitrova E. [Formation of professional qualities in nursing students in the process of clinical training.]. Health Care. 2006;4:24-7. Bulgarian.
4. 4. Jeleva F. [Methodology of training on Health Care and formation of professional competences of the future healthcare professional. Scientific papers of the University of Rousse. 2016;55(8.1):106-10. Bulgarian.
5. 5. Miteva K. [The process of training to build the professional competencies of medical professionals]. Sisterhood.2011; 1-2:47-51. Bulgarian.