[MathOuvrage]
Orthogonal polynomials of several variables
/ Dunkl, Charles F. ; Xu, Yuan.
-Cambridge : Cambridge university Press, 2014. - xvii, 420 p. ; 24 cm
ISBN 9781107071896
[MathOuvrage]
Groups and geometric analysis
/ Helgason, Sigurdur.
-Providence RI : American mathematical Society, 2000. - xxii, 667 p. ; 26 cm
ISBN 9780821826737