Pop, Petrica C. Generalized Network Design Problems. Modeling and Optimization. Berlin, Boston: De Gruyter, 2012. Web. Retrieved 25 May. 2013, from http://www.degruyter.com/view/product/179389

Pop, P. (2012). Generalized Network Design Problems. Modeling and Optimization. Berlin, Boston: De Gruyter. Retrieved 25 May. 2013, from http://www.degruyter.com/view/product/179389

Pop, Petrica C. 2012. Generalized Network Design Problems. Modeling and Optimization. Berlin, Boston: De Gruyter. Retrieved 25 May. 2013, from http://www.degruyter.com/view/product/179389