Complex-mass renormalization in hadronic EFT: Applicability at two-loop order D. Djukanovic, E. Epelbaum, J. Gegelia, H. Krebs and U. -G. Meißner Eur. Phys. J. A, 51 8 (2015) 101 Published online: 20 August 2015 DOI: 10.1140/epja/i2015-15101-5