@article{MOMA_1965__69_177301,
     author = {J.S.W. Wong and D. Willett},
     title = {On the {Discrete} {Analogues} of {Some} {Genralizations} of {Gronwall's} {Inequality.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {362--367},
     publisher = {mathdoc},
     volume = {69},
     year = {1965},
     zbl = {0145.06003},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1965__69_177301/}
}