@article{10_4064_cm_17_1_147_152,
     author = {J. {\L}ukaszewicz},
     title = {Julian {Perkal}},
     journal = {Colloquium Mathematicum},
     pages = {147--152},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1967},
     doi = {10.4064/cm-17-1-147-152},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-17-1-147-152/}
}