Exact holography of the mass-deformed M2-brane theory Dongmin Jang, Yoonbai Kim, O-Kab Kwon and D. D. Tolla Eur. Phys. J. C, 77 5 (2017) 342 Published online: 23 May 2017 DOI: 10.1140/epjc/s10052-017-4909-3