Асенов Е. Evaluation of the Impact of Sanctions in the Energy Sector Against Russia and the Possibilities for Strengthening Their Efficiency. НТ [интернет]. 03 Февруари 2023 [цитиран 22 Юли 2026];(5):41-52. достъпен на: https://yb.e-dnrs.org/index.php/rp/article/view/5172