A fast and complete GEANT4 and ROOT Object-Oriented Toolkit: GROOT D. Lattuada, D. L. Balabanski, S. Chesnevskaya, M. Costa, V. Crucillà, G. L. Guardo, M. La Cognata, C. Matei, R. G. Pizzone, S. Romano et al. (3 more) EPJ Web Conf., 165 (2017) 01034 Published online: 30 December 2017 DOI: 10.1051/epjconf/201716501034