@article{10_21136_CMJ_1965_100660,
     author = {Babu\v{s}ka, Ivo and V\'yborn\'y, Rudolf},
     title = {Continuous dependence of eigenvalues on the domain},
     journal = {Czechoslovak Mathematical Journal},
     pages = {169--178},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1965},
     doi = {10.21136/CMJ.1965.100660},
     mrnumber = {0182799},
     zbl = {0137.32302},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1965.100660/}
}