NGC 2440Michigan Tech. U., February 15, 2007 [2011-11-14], (原始内容存档于2010-12-09) James, Renée; Marion, Howie, X-treme Stars of the cosmos, Astronomy (Kalmbach Publishing
连续q雅可比多项式1}P_{n}^{(\alpha ;\beta )}(x|q)=P_{n}^{(\alpha ;\beta )}(x|q)} Askey, Richard; Wilson, James, Some basic hypergeometric orthogonal polynomials that generalize Jacobi