V. Arguedas T., “José Echegaray, a multi-faceted mathematician: Nobel Prize in Literature, an outstanding politician, promoter of Spanish physics and mathematics at the end of the 20th century and the beginning of the 20th: José Echegaray, un matemático polifacético: Premio nobel literatura, político destacadísimo, impulsor de la física y mate española al final del siglo IXX y de principios del XX”., RDMEI, vol. 19, no. 2, Apr. 2019.