Graph Learning Based on Signal Smoothness Representation for Homogeneous and Heterogeneous Change Detection. - David Alejandro Jimenez Sierra; David Alfredo Quintero-Olaya; Juan Carlos Alvear-Muñoz; Hernán Darío Benítez-Restrepo; Juan Felipe Florez-Ospina; Jocelyn Chanussot (IEEE Trans. Geosci. Remote. Sens., 2022)