@article{NUMA_1970__14_131966,
     author = {R. GORENFLO},
     title = {Nichtnegativit\"ats- und substanzerhaltende {Differenzenschemata} f\"ur lineare {Diffusionsgleichungen.}},
     journal = {Numerische Mathematik},
     pages = {448--467},
     publisher = {mathdoc},
     volume = {14},
     year = {1970},
     zbl = {0179.22302},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__14_131966/}
}