1. M. Abramowitz and I. A. Stegun, Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables (Dover Publ., New York, 1972).
2. Encyclopedia Math. Appl.;S. R. Finch,2003
3. D. M. Bradley, “Representations of Catalan’s Constant,” (2001).
4. K. A. Mirzoev and T. A. Safonova, Dokl. Math. 102, 396 (2020).
5. K. A. Mirzoev and T. A. Safonova, Math. Notes 108 (4), 617 (2020).