@article{10_14708_cm_v30i2_6320,
     author = {A. Kasperski},
     title = {Modular approximation in {\(X_\varphi^1\)} by a filtered family of sublinear operators and convex operators},
     journal = {Commentationes Mathematicae},
     pages = { 331--334},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {1991},
     doi = {10.14708/cm.v30i2.6320},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v30i2.6320/}
}