Fabio Simeoni Leonardo Candela David Lievens Pasquale Pagano Manuele Simi Functional Adaptivity for Digital Library Services in e-Infrastructures: The gCube Approach. 51-62 2009 ECDL http://dx.doi.org/10.1007/978-3-642-04346-8_7 conf/ercimdl/2009 db/conf/ercimdl/ecdl2009.html#SimeoniCLPS09