New proposals for modelling and solving the problem of covering solids using spheres of different radiiPedro Henrique González Silva, Ana Flávia U. S. Macambira, Renan Vicente Pinto, Luidi Simonetti, Nelson Maculan and Philippe MichelonRAIRO-Oper. Res., 54 3 (2020) 873-882DOI: https://doi.org/10.1051/ro/2019041
