@article{AMI_2005_32_a4,
     author = {W{\l}odzimierz {\L}enski},
     title = {Pointwise very strong approximation as a generalization of {Fej\'er{\textquoteright}s} summation theorem},
     journal = {Annales mathematicae et informaticae},
     pages = {79--86},
     publisher = {mathdoc},
     volume = {32},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2005_32_a4/}
}