@article{MZ_1972__125_171699,
     author = {Joaquin Bustoz and Donald Wright},
     title = {On {Gronwall} {Summability.}},
     journal = {Mathematische Zeitschrift},
     pages = {177--183},
     publisher = {mathdoc},
     volume = {125},
     year = {1972},
     zbl = {0227.40006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__125_171699/}
}