Cebollero, J.A. Lahoz, R. Laguna-Bercero, M.A. Peña, J.I. Larrea, A. Orera, V.M. Characterization of laser-processed thin ceramic membranes for electrolyte-supported solid oxide fuel cells Int. j. hydrogen energy 10.1016/j.ijhydene.2016.12.112 2017 2017