@article{JRAM_1972__257_151264,
     author = {S.G. Wayment and L. Hatta},
     title = {A derivative to match the v-integral.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {16--28},
     publisher = {mathdoc},
     volume = {257},
     year = {1972},
     zbl = {0244.26002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__257_151264/}
}