J-PLUS: measuring Hα emission line fluxes in the nearby universe - Logroño-García, R; Coelho, Paula Rodrigues Teixeira; Costa-Duarte, M. V; Hernadez-Jimenez, J. A; Oliveira, Claudia Lucia Mendes de; Sodré Júnior, Laerte (Astronomy & Astrophysics, 2019)