Enrique Castillo Roberto Mínguez Carmen Castillo Antonio S. Cofiño Dealing with the multiplicity of solutions of the <i>l</i><sub>1</sub> and <i>l</i><sub> INFINITY </sub> regression models. 460-484 2008 188 European Journal of Operational Research 2 http://dx.doi.org/10.1016/j.ejor.2007.04.020 db/journals/eor/eor188.html#CastilloMCC08