Penkova, T. Improving Regional Security Through Border Management and Control,
Издателски комплекс - УНСС, , 167-174.
Penkova, T. .
Improving Regional Security Through Border Management and Control.
Sofia: Издателски комплекс - УНСС, , 167-174.
Penkova, T. ()
Improving Regional Security Through Border Management and Control,
Sofia: Издателски комплекс - УНСС, 167-174
Penkova, T.
().
Improving Regional Security Through Border Management and Control. Trends in Regional Development and Security Management : International Scientific Conference : 4 - 6 October 2018 (с. 167-174). Sofia: Издателски комплекс - УНСС.