Srinivasa Raghava and R. Sivaraman , Trans., “A Family of Cotangent-Polylogarithm Integrals, Harmonic Sums, and Level-Four Cyclotomy”, IJAM, vol. 6, no. 2, pp. 60–64, Oct. 2026, doi: 10.54105/ijam.A1256.07010427.