APA (7th ed.) Citation

Heckman, G. J. (1989). An elementary approach to the Opdam operators.

Chicago Style (17th ed.) Citation

Heckman, Gerrit J. An Elementary Approach to the Opdam Operators. Nijmegen, the Netherlands, 1989.

MLA (9th ed.) Citation

Heckman, Gerrit J. An Elementary Approach to the Opdam Operators. 1989.

Warning: These citations may not always be 100% accurate.