@article{AFM_1981_6_2_a6,
     author = {Pekka Neittaanm\"aki and Rainer Picard},
     title = {On the convergence of the finite element approximation of eigenfrequencies and eigenvectors to {Maxwell's} boundary value problem},
     journal = {Annales Fennici Mathematici},
     pages = {255--271},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1981},
     doi = {10.5186/aasfm.1981.0613},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1981.0613/}
}