Petrov, P., Serafimova, D. Hidden Champions of Bulgaria. Cham, Germany: Springer Publ., 2026 pp. 203–221, ISBN 978-3-032-08262-6 (print); 978-3-032-08263-3.
Petrov, P., Serafimova, D. Hidden Champions of Bulgaria. Cham, Germany: Springer Publ., 2026 pp. 203–221, ISBN 978-3-032-08262-6 (print); 978-3-032-08263-3.
Petrov, P., Serafimova, D. (2026) Hidden Champions of Bulgaria, Cham, Germany: Springer Publ. pp. 203–221, ISBN 978-3-032-08262-6 (print); 978-3-032-08263-3.
Petrov, P., & Serafimova, D. (2026). Hidden Champions of Bulgaria. Cham, Germany: Springer Publ., pp. 203–221.
Petrov P, Serafimova D. Hidden Champions of Bulgaria. Cham, Germany: Springer Publ.; 2026. p. pp. 203–221. ISBN: ISBN 978-3-032-08262-6 (print); 978-3-032-08263-3.
