@article{10_4171_ifb_407,
     author = {Giovanni Bellettini and Maurizio Paolini and Franco Pasquarelli},
     title = {Triple covers and a non-simply connected surface spanning an elongated tetrahedron and beating the cone},
     journal = {Interfaces and free boundaries},
     pages = {407--436},
     year = {2018},
     volume = {20},
     number = {3},
     doi = {10.4171/ifb/407},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/407/}
}