@article{10_4064_ap_17_2_129_136,
     author = {Jan Bochenek},
     title = {On the boundary domains of the n-th eigenfunctions for the self-adjoined elliptic equation},
     journal = {Annales Polonici Mathematici},
     pages = {129--136},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1965},
     doi = {10.4064/ap-17-2-129-136},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-17-2-129-136/}
}