3563 20180920143125.0 10.3847/1538-4357/aad043 DOI SCART-2018-0057 Cliver, Edward W. Size Distributions of Solar Proton Events and Their Associated Soft X-Ray Flares: Application of the Maximum Likelihood Estimator 2018 BELSPO/ PRODEX/ PRODEX STCE D’Huys, Elke The Astrophysical Journal 864 2018 1 elke.dhuys@observatoire.be published in REFERD