@article{SM_2005_196_5_a3,
     author = {M. Yu. Planida},
     title = {Asymptotics of the eigenelements of the {Laplacian} with singular perturbations of boundary conditions on narrow and thin sets},
     journal = {Sbornik. Mathematics},
     pages = {703--741},
     publisher = {mathdoc},
     volume = {196},
     number = {5},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2005_196_5_a3/}
}