@article{BUMI_1962_3_17_2_a5,
     author = {Bellman, Richard},
     title = {Some questions concerning difference approximations to partial  differential equations.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {188--190},
     publisher = {mathdoc},
     volume = {Ser. 3, 17},
     number = {2},
     year = {1962},
     zbl = {0106.10802},
     mrnumber = {142203},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1962_3_17_2_a5/}
}