@article{10_4064_cm_10_1_147_150,
     author = {W. Mlak},
     title = {Integration of the first order partial differential inequality with distributions},
     journal = {Colloquium Mathematicum},
     pages = {147--150},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1963},
     doi = {10.4064/cm-10-1-147-150},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-10-1-147-150/}
}