@article{paperid:101906,
author = { -,  - and Taghizadeh Kakhki, Hossein and Rainer Burkard},
title = {ََAn ant colony algorithm for the pos/neg weighted p-median problem},
journal = {Central European Journal of Operations Research},
year = {2006},
volume = {14},
number = {3},
month = {February},
issn = {1435-246X},
pages = {229--246},
			numpages = {17},
keywords = {Ant colony optimization - Location theory -  p-Median problem - Obnoxious facilities},
}