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by Juan Gabriel Segovia-Hernandez; Eduardo Sanchez-Ramirez; Cesar Ramirez-Marquez; et al.
by Sanchez, Juan J.
by Alvarez, Celia; Sanchez, Juan Carlos
by Sanchez Arnau, Juan Carlos
by Sanchez, Juan Manuel
by Freire, Juan C. Sierra; Gomez, Ana I. Sanchez; Buela-casal, Gualberto
by Sanchez, Juan Fernandez
by Martin, Juan C.; Sanchez, Pedro A.; Trigo, Valeriano
by Sanchez, Juan Vicente Gutierrez
by Velasco Sanchez, Juan