@article{AFST_2019_6_28_3_593_0,
     author = {Mondal, Sugata},
     title = {Topological properties of eigenfunctions of {Riemannian} surfaces},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {593--618},
     publisher = {Universit\'e Paul Sabatier, Toulouse},
     volume = {Ser. 6, 28},
     number = {3},
     year = {2019},
     doi = {10.5802/afst.1610},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/afst.1610/}
}