@article{MAN_1970__190_162091,
     author = {F. Stummel},
     title = {Diskrete {Konvergenz} linearer {Operatoren.} {I.}},
     journal = {Mathematische Annalen},
     pages = {45--92},
     publisher = {mathdoc},
     volume = {190},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MAN_1970__190_162091/}
}