D. Borwein et Jm. Borwein, ON AN INTRIGUING INTEGRAL AND SOME SERIES RELATED TO ZETA(4), Proceedings of the American Mathematical Society, 123(4), 1995, pp. 1191-1198
An intriguing log-cosine integral is fully analyzed and shown to have
value a rational multiple of pi zeta(4), zeta being the Riemann zeta f
unction. From this we deduce by means of generating functions and Pars
eval's identity the sums of certain series previously established by a
completely different method.