@article {turkougullari2010optimal, title = {Optimal placement, scheduling, and routing to maximize lifetime in sensor networks}, journal = {Journal of the Operational Research Society}, volume = {61}, number = {6}, year = {2010}, pages = {1000{\textendash}1012}, publisher = {Nature Publishing Group}, author = {T{\"u}rko{\u g}ullar{\i}, YB and Necati Aras and I. Kuban Altinel and Ersoy, Cem} }