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@article{APo/Ane/2007, author = "Poncela Gonz{\'a}lez, Alberto and Urdiales Garc{\'i}a, Cristina and de Trazegnies Otero, Carmen and Sandoval Hern{\'a}ndez, Francisco", journal = "Soft Computing, Vol. 11, No. 3", note = " Febrero 2007 ", pages = "pp. 281-285", title = "{A} new sonar-based landmark for localization in indoor environments", year = "2007", }