@conference {NaBIC2011,
	title = {Solving the Node Localization Problem in WSNs by a Two-objective Evolutionary Algorithm and Gradient Descent},
	booktitle = {the 3-th IEEE World Congress on Nature and Biologically Inspired Computing (NaBIC 2011)},
	year = {2011},
	author = {Massimo Vecchio and R. L{\'o}pez-Valcarce and Francesco Marcelloni}
}
