@article{MOMA_1975__79_177698,
     author = {R.N. Mohapatra and G. Das},
     title = {Summability {Factors} for {Lower-Semi-Matrix} {Transformations.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {307--316},
     publisher = {mathdoc},
     volume = {79},
     year = {1975},
     zbl = {0318.40004},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1975__79_177698/}
}