@article{10_4064_ap_29_1_15_59,
     author = {Andrzej Pelczar},
     title = {Some generalizations of the retract theorem
of {T.} {Wa\.zewski} with applications to ordinary
and partial differential equations of the first order},
     journal = {Annales Polonici Mathematici},
     pages = {15--59},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1974},
     doi = {10.4064/ap-29-1-15-59},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-29-1-15-59/}
}