@article{MZ_1991__208_3_174300,
     author = {Lech Maligranada and Witold Wnuk},
     title = {Landau type theoerem for {Orlicz} spaces.},
     journal = {Mathematische Zeitschrift},
     pages = {57--64},
     publisher = {mathdoc},
     volume = {208},
     number = {3},
     year = {1991},
     zbl = {0738.46013},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174300/}
}