Stoyanova, R., R. Dimova, M. Tarnovska, T. Boeva, R. Dimov, and I. Doykov. “Comparing Patient Safety Culture in Bulgarian, Croatian and American Hospitals – Preliminary Results”. Medicine and Pharmacy Reports, vol. 92, no. 3, July 2019, pp. 265-70, doi:10.15386/mpr-1267.