A geometric perspective of the Weiszfeld algorithm for solving the Fermat−Weber problemHelder Manoel Venceslau, Marilis Bahr Karam Venceslau, Adilson Elias Xavier and Nelson MaculanRAIRO-Oper. Res., 50 1 (2016) 157-173DOI: https://doi.org/10.1051/ro/2015022