Charles F. Dunkl: Differential-difference operators associated to reflection groups. In: Transactions of the American Mathematical Society. Band311, Nr.1, 1989, ISSN0002-9947, S.171, doi:10.2307/2001022 (Theorem 1.9).
Léonard Gallardo und Marc Yor: A chaotic representation property of the multidimensional Dunkl processes. In: Institute of Mathematical Statistics (Hrsg.): The Annals of Probability. Band34, Nr.4, 2006, S.1530–1549, doi:10.1214/009117906000000133.}
Charles F. Dunkl: Differential-difference operators associated to reflection groups. In: Transactions of the American Mathematical Society. Band311, Nr.1, 1989, ISSN0002-9947, S.171, doi:10.2307/2001022 (Theorem 1.9).