Nm. Atakishiyev, RAMANUJAN-TYPE CONTINUOUS MEASURES FOR BIORTHOGONAL Q-RATIONAL FUNCTIONS, Journal of physics. A, mathematical and general, 29(2), 1996, pp. 329-338
It is shown that Ramanujan-type continuous measures for a hierarchy of
(4) phi(3) biorthogonal rational functions can be systematically buil
t from simple cases of the Rogers-Szego (for 0 < q < 1) and Stieltjes-
Wigert (for q > 1) polynomials by using the Berg-Ismail procedure of a
ttaching generating functions to measures.