1. Orthogonal Polynomials and Special Functions;Askey,1975
2. On the best constant in Markov-type inequalities involving Gegenbauer norms with different weights;Böttcher;Oper. Matrices,2010
3. Weighted Markov-type inequalities, norms of Volterra operators, and zeros of Bessel functions;Böttcher;Math. Nachr.,2010
4. On the best constant in Markov-type inequalities involving Laguerre norms with different weights;Böttcher;Monatsh. Math.,2011
5. Über die bestmögliche konstante in Markov–Ungleichungen mit leguerre gewicht;Dörfler;Österreich. Akad. Wiss. Math.-Natur. Kl. Sitzungsber. II,1991