Unveiling regions in multi-scale Feynman integrals using singularities and power geometry B. Ananthanarayan, Abhishek Pal, S. Ramanan and Ratan Sarkar Eur. Phys. J. C, 79 1 (2019) 57 Published online: 22 January 2019 DOI: 10.1140/epjc/s10052-019-6533-x