Celebratio Mathematica

R. As­key and M. E. H. Is­mail: “A gen­er­al­iz­a­tion of ul­tra­s­pher­ic­al poly­no­mi­als,” pp. 55–​78 in Stud­ies in pure math­em­at­ics: To the memory of Paul Turán. Edi­ted by P. Er­dős. Birkhäuser (Basel), 1983. MR 820210 Zbl 0532.​33006 incollection

R. As­key, P. S. Bruck­man, and P. Er­dos: “Prob­lems and solu­tions: Ad­vanced prob­lems: 6445–6447,” Amer. Math. Monthly 90 : 10 (1983), pp. 709–​710. MR 1540315 article