We obtain a q-linear analogue of Gegenbauer's expansion of the plane wave.
It is expanded in terms of the little q-Gegenbauer polynomials and the
\textit{third} Jackson q-Bessel function. The result is obtained by using a
method based on bilinear biorthogonal expansions.Comment: 12 pages, to appear in Adv. in Appl. Math. arXiv admin note: text
overlap with arXiv:0909.006
