@article{10_4171_ifb_397,
     author = {Matthieu Bonnivard and Antoine Lemenant and Vincent Millot},
     title = {On a phase field approximation of the planar {Steiner} problem: {Existence,} regularity, and asymptotic of minimizers},
     journal = {Interfaces and free boundaries},
     pages = {69--106},
     year = {2018},
     volume = {20},
     number = {1},
     doi = {10.4171/ifb/397},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/397/}
}