Revisiting the European sovereign bonds with a permutation-information-theory approach Aurelio Fernández Bariviera, Luciano Zunino, María Belén Guercio, Lisana B. Martinez and Osvaldo A. Rosso Eur. Phys. J. B, 86 12 (2013) 509 Published online: 16 December 2013 DOI: 10.1140/epjb/e2013-40660-7