Enrique Arias Angelines Alberto Jesús Montesinos Tomás Rojo Fernando Cuartero Jesús Benet A mathematical model of the static pantograph/catenary interaction. 333-340 2009 86 Int. J. Comput. Math. 2 http://dx.doi.org/10.1080/00207160802044100 db/journals/ijcm/ijcm86.html#AriasAMRCB09