@article{NUMA_1967__10_131798,
     author = {D. EISEN},
     title = {On the {Numerical} {Solution} of ut=urr+ (2.. r)ur .},
     journal = {Numerische Mathematik},
     pages = {397--409},
     publisher = {mathdoc},
     volume = {10},
     year = {1967},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1967__10_131798/}
}