I. Gialampoukidis, A. Moumtzidou, D. Liparas, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, “Multimedia retrieval based on non-linear graph-based fusion and partial least squares regression“, Multimedia Tools and Applications, vol. 76, pp. 22383–22403, 15 May, 2017.