Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1954__61_169447, author = {H.C. Gupta}, title = {An operational relation.}, journal = {Mathematische Zeitschrift}, pages = {70--74}, publisher = {mathdoc}, volume = {61}, year = {1954}, zbl = {0057.05604}, url = {http://geodesic.mathdoc.fr/item/MZ_1954__61_169447/} }
H.C. Gupta. An operational relation.. Mathematische Zeitschrift, Tome 61 (1954), pp. 70-74. http://geodesic.mathdoc.fr/item/MZ_1954__61_169447/