@article{10_14708_cm_v10i1_5573,
     author = {J. Musialek},
     title = {Some properties of zeros of solutions of second-order linear partial differential equations of elliptic type},
     journal = {Commentationes Mathematicae},
     pages = { 27--36},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1966},
     doi = {10.14708/cm.v10i1.5573},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v10i1.5573/}
}