@ARTICLE {15520,
author={S. T. Tyagi and S. T. Tanwar and S. G. Gupta and N. K. Kumar and J. R. Rodrigues},
doi={10.1007/s11235-014-9884-5},
journal={Telecommunication Systems},
title={A lifetime extended multi-levels heterogeneous routing protocol for wireless sensor networks},
year={2015},
month={May},
volume={59},
number={1},
pages={43-62},
ISSN={1018-4864}
}