Jesús Guillera, Jonathan Sondow: Double integrals and infinite products for some classical constants via analytic continuations of Lerch's transcendent. In: Ramanujan Journal. An international Journal devoted to the areas of mathematics, Bd. 16 (2008), Nummer 3, Seiten 247–270, ISSN1382-4090; vgl. in arxiv
Jesús Guillera, Jonathan Sondow: Double integrals and infinite products for some classical constants via analytic continuations of Lerch's transcendent. In: Ramanujan Journal. An international Journal devoted to the areas of mathematics, Bd. 16 (2008), Nummer 3, Seiten 247–270, ISSN1382-4090; vgl. in arxiv