Dimitrova, V., Marinov Georgiev, G., Boshnakov, P. Wine Quality Improvement Based on the Perception of Protected Designation of Origin (PDO) and Protected Geographical Indication (PGI): Evidence from Bulgaria. New York: Springer Nature, 2024 pp. 193-199. -(AISME 2022: Circul. Econ. a. Sust.), iSBN 9778-3-031-28291-1 (print) ; 978-3-031-28292-.