Bulgaria ∙ Key Public Procurement and Concessions Developments journal article Neli Garbuzanova, Yoana Blyahova European Procurement & Public Private Partnership Law Review, Volume 17 (2022), Issue 1, Page 44 - 50
Estimated Value vs Final Contract Value in Works Public Procurement – What Causes the Discrepancy? Marko Turudić, Melko Dragojević