Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1968__11_131807, author = {S. HELLER}, title = {On the {Uniform} {Positivity} of a {Certain} {Finite} {Difference} {Matrix.}}, journal = {Numerische Mathematik}, pages = {46--52}, publisher = {mathdoc}, volume = {11}, year = {1968}, zbl = {0155.47001}, url = {http://geodesic.mathdoc.fr/item/NUMA_1968__11_131807/} }
S. HELLER. On the Uniform Positivity of a Certain Finite Difference Matrix.. Numerische Mathematik, Tome 11 (1968), pp. 46-52. http://geodesic.mathdoc.fr/item/NUMA_1968__11_131807/