@article{10_14708_cm_v22i2_6020,
     author = {L. H\k{a}cia},
     title = {On approximate solution on integral equations in the space-time},
     journal = {Commentationes Mathematicae},
     pages = { 239--243},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1981},
     doi = {10.14708/cm.v22i2.6020},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v22i2.6020/}
}