Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1959__1_131423, author = {A. WALTHER and H. SCHAPPERT}, title = {Numerische {Behandlung} des {Gelenkvierecks.}}, journal = {Numerische Mathematik}, pages = {110--120}, publisher = {mathdoc}, volume = {1}, year = {1959}, zbl = {0084.40002}, url = {http://geodesic.mathdoc.fr/item/NUMA_1959__1_131423/} }
A. WALTHER; H. SCHAPPERT. Numerische Behandlung des Gelenkvierecks.. Numerische Mathematik, Tome 1 (1959), pp. 110-120. http://geodesic.mathdoc.fr/item/NUMA_1959__1_131423/