Quantum interference effects in Higgs boson pair-production beyond the standard model Biswaranjan Das, Stefano Moretti, Shoaib Munir and Poulose Poulose Eur. Phys. J. C, 81 4 (2021) 347 Published online: 21 April 2021 DOI: 10.1140/epjc/s10052-021-09023-w