@article{10_14708_cm_v16i1_5728,
     author = {A. Jankowski and E. Rubinsztejn},
     title = {Functions with non-degenerate critical points on manifolds with boundary},
     journal = {Commentationes Mathematicae},
     pages = { 99--112},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1972},
     doi = {10.14708/cm.v16i1.5728},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v16i1.5728/}
}