Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AM2_1986__31_137147, author = {R.R. Kocherlakota}, title = {Functions of a quaternion variable which are gradients of real-valued functions.}, journal = {Aequationes mathematicae}, pages = {109--117}, publisher = {mathdoc}, volume = {31}, year = {1986}, zbl = {0603.30058}, url = {http://geodesic.mathdoc.fr/item/AM2_1986__31_137147/} }
R.R. Kocherlakota. Functions of a quaternion variable which are gradients of real-valued functions.. Aequationes mathematicae, Tome 31 (1986), pp. 109-117. http://geodesic.mathdoc.fr/item/AM2_1986__31_137147/