@article{MZ_1965__89_170447,
     author = {Soraya Sherif},
     title = {Trauberian constants for general triangular matrices and certain special types of {Hausdorff} means.},
     journal = {Mathematische Zeitschrift},
     pages = {312--323},
     publisher = {mathdoc},
     volume = {89},
     year = {1965},
     zbl = {0128.28405},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__89_170447/}
}