Ioannis Caragiannis Christos Kaklamanis Panagiotis Kanellopoulos Energy-Efficient Wireless Network Design. 593-617 2006 39 Theory Comput. Syst. 5 http://dx.doi.org/10.1007/s00224-005-1204-8 db/journals/mst/mst39.html#CaragiannisKK06