@article{10_14708_ma_v23i37_1824,
     author = {E. Lewi\'nska},
     title = {Approximation of the eigenvalue problem for elliptic operator by finite element method with numerical integration},
     journal = {Mathematica Applicanda},
     pages = { 3--14},
     publisher = {mathdoc},
     volume = {23},
     number = {37},
     year = {1994},
     doi = {10.14708/ma.v23i37.1824},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v23i37.1824/}
}