Incorporating Sub-Dominant Classes in the Accuracy Assessment of Large-Area Land Cover Products: Application to GlobCover, MODISLC, GLC2000 and CORINE in Spain. - Ana Pérez-Hoyos; Francisco Javier García-Haro; Nuria Valcárcel (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2014)