@misc { príretrod2014, author = "Príncipe, Pedro and Rettberg, Najla and Rodrigues, Eloy and Elbćk, Mikael Karstensen and Schirrwagen, Jochen and Houssos, Nikos and Jörg, Brigitte", title = "OpenAIRE guidelines: supporting interoperability for literature repositories, data archives and CRIS", year = "2014" }