1 “... in Varna, Bulgaria, September 29 – October 3, 2007. The conference included 3 keynote talks, 36 research...”

2 Table of Contents: “... Work in Bulgaria: Policy, Practice, Education...”

3 “... and Lower Reaches of the Danube« (2017 to 2019), which focused on healthcare in Bulgaria, Germany...”

4 “... countries: Austria, Australia, Bulgaria, Canada, China (Hong Kong), Estonia, Denmark, Germany, Italy, Poland...”

5 “..., Turkey, Bulgaria, Romania, as well as Germany, Italy and the United States of America. The Black Sea...”