@article{10_4171_emss_15,
     author = {Alberto Enciso and Daniel Peralta-Salas},
     title = {Topological monsters in elliptic equations and spectral theory},
     journal = {EMS surveys in mathematical sciences},
     pages = {107--130},
     year = {2016},
     volume = {3},
     number = {1},
     doi = {10.4171/emss/15},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/emss/15/}
}