Stefan Nickel. Bicriteria and restricted 2-Facility Weber Problems. Math. Meth. of OR, 45(2):167-195, 1997. [doi]
@article{Nickel97, title = {Bicriteria and restricted 2-Facility Weber Problems}, author = {Stefan Nickel}, year = {1997}, doi = {10.1007/BF01193859}, url = {http://dx.doi.org/10.1007/BF01193859}, researchr = {https://researchr.org/publication/Nickel97}, cites = {0}, citedby = {0}, journal = {Math. Meth. of OR}, volume = {45}, number = {2}, pages = {167-195}, }