In this paper we provide a finite set of candidates to be one of the endpoints of an optimal solution for the problem of locating simultaneously a service facility and a rapid transit line.
@article{arxiv.1110.2605,
title = {On the simultaneous location of a service facility and a rapid transit line},
author = {I. Espejo and A. M. Rodríguez-Chía},
journal= {arXiv preprint arXiv:1110.2605},
year = {2011}
}