@article{paperid:1048513, author = {Aliakbarian, Nasrin and Dehghanian, Farzad and Salari, Majid}, title = {A bi-level programming model for protection of hierarchical facilities under imminent attacks}, journal = {Computers and Operations Research}, year = {2015}, volume = {64}, month = {December}, issn = {0305-0548}, pages = {210--224}, numpages = {14}, keywords = {Hierarchical facility location; Protection planning; Interdiction; Bi-level programming; Variable depth neighborhood search; Simulated annealing.}, }