@article{10_14708_cm_v25i1_6113,
     author = {M. Filar},
     title = {Boundary problems for the homogeneous iterated {Helmholtz} equation in a certain unbounded domain of the {Euclidean} n-space},
     journal = {Commentationes Mathematicae},
     pages = { 31--48},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1985},
     doi = {10.14708/cm.v25i1.6113},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v25i1.6113/}
}