Financial support from the Ministerio de Ciencia e Innovacion – FEDER (grant CTQ2010-17436; FPI fellowship to I. R.), and the Gobierno de Aragon – FSE (research group E40) is gratefully acknowledged.
非常感谢部长级 Ciencia e Innovacion – FEDER(授予 CTQ2010-17436;FPI 奖学金给 IR)和 Gobierno de Aragon – FSE(研究组 E40)的财政支持。