@article{ARM_2009__45_2_a5,
     author = {Rempulska, Lucyna and Tomczak, Karolina},
     title = {On some properties of the {Picard} operators},
     journal = {Archivum mathematicum},
     pages = {125--135},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {2009},
     mrnumber = {2591669},
     zbl = {1212.41055},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2009__45_2_a5/}
}