Raivis Skadiņš, Jörg Tiedemann, Roberts Rozis and Daiga Deksne (2014): Billions of Parallel Words for Free, In Proceedings of LREC 2014, Reykjavik, Iceland [bib] [pdf] Source: http://bookshop.europa.eu - Thanks to Tilde (http://www.tilde.com) for collecting the data, within the EU ICT PSP project LetsMT! (https://www.letsmt.eu/) Thanks for OPUS for making it available.