MLPF: efficient machine-learned particle-flow reconstruction using graph neural networksJoosep Pata, Javier Duarte, Jean-Roch Vlimant, Maurizio Pierini and Maria SpiropuluEur. Phys. J. C, 81 5 (2021) 381DOI: https://doi.org/10.1140/epjc/s10052-021-09158-w