Top–down holographic G-structure glueball spectroscopy at (N)LO in N and finite coupling Karunava Sil, Vikas Yadav and Aalok Misra Eur. Phys. J. C, 77 6 (2017) 381 Published online: 09 June 2017 DOI: 10.1140/epjc/s10052-017-4921-7