Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1988__106_1_178397, author = {B.P. Duggal}, title = {On {Intertwining} {Operators.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {139--148}, publisher = {mathdoc}, volume = {106}, number = {1}, year = {1988}, zbl = {0652.47019}, url = {http://geodesic.mathdoc.fr/item/MOMA_1988__106_1_178397/} }
B.P. Duggal. On Intertwining Operators.. Monatshefte für Mathematik, Tome 106 (1988) no. 1, pp. 139-148. http://geodesic.mathdoc.fr/item/MOMA_1988__106_1_178397/