Liu, Zhongqiang and Nadim, Farrokh and Garcia-Aristizabal, Alexander and Mignan, Arnaud and Fleming, Kevin and Luna, Byron Quan  (2015) A three-level framework for multi-risk assessment.  Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, 9 (2).  pp. 59-74. DOI: https://doi.org/10.1080/17499518.2015.1041989 <https://doi.org/10.1080/17499518.2015.1041989>