1. Handbook of Mathematical Functions;Abramowitz,1972
2. Inequalities for the constants of Landau and Lebesgue;Alzer;J. Comput. Appl. Math.,2002
3. A sharp estimate of the Landau constants;Brutman;J. Approx. Theory,1982
4. New bounds and asymptotic expansions for the constants of Landau and Lebesgue;Chen;Appl. Math. Comput.,2014
5. Inequalities and asymptotic expansions for the constants of Landau and Lebesgue;Chen;Appl. Math. Comput.,2014