Mitigating cascades in sandpile models: an immunization strategy for systemic risk?Antonio Scala, Vinko Zlatić, Guido Caldarelli and Gregorio D'AgostinoEur. Phys. J. Special Topics, 225 10 (2016) 2017-2023DOI: https://doi.org/10.1140/epjst/e2016-60001-7