1. [1] R. Askey, “Evaluation of Sylvester type determinants using orthogonal polynomials” in Proceedings of the Fourth ISAAC Congress on Advances in Analysis, World Scientific, Singapore, 2005, 1–13.
2. [2] L. Barchini, A. C. Kable, and R. Zierau, Conformally invariant systems of differential operators, Adv. Math. 221 (2009), 788–811.
3. [3] L. Ehrenpreis, “Hypergeometric functions” in Algebraic Analysis: Papers Dedicated to Professor Mikio Sato on the Occasion of His Sixtieth Birthday, I, Academic Press, Boston, 1988, 85–128.
4. [4] R. Howe, “Perspectives on invariant theory: Schur duality, multiplicity-free actions and beyond” in The Schur Lectures (1992), Israel Math. Conf. Proc. 8, Gelbart Res. Inst. Math. Sci., Bar-Ilan Univ., Ramat-Gan, Israel, 1995, 1–182.
5. [5] R. Howe and S. T. Lee, Degenerate principal series representations of $\mathrm{GL}_{n}(\mathbb{C})$ and $\mathrm{GL}_{n}(\mathbb{R})$, J. Funct. Anal. 166 (1999), 244–309.