@article{NUMA_1983__42_132876,
     author = {M.N. Spijker},
     title = {Contractivity in the {Numerical} {Solution} of {Initial} {Value} {Problems.}},
     journal = {Numerische Mathematik},
     pages = {271--290},
     publisher = {mathdoc},
     volume = {42},
     year = {1983},
     zbl = {0504.65030},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1983__42_132876/}
}