@article{NUMA_1968__12_131867,
     author = {H.O. KREISS},
     title = {On the {Numerical} {Solution} of the {Spherically} {Symmetric} {Diffusion} {Equation.}},
     journal = {Numerische Mathematik},
     pages = {223--225},
     publisher = {mathdoc},
     volume = {12},
     year = {1968},
     zbl = {0165.50901},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__12_131867/}
}