RefSeek (rĕf-sēk) is a web search engine for students and researchers. RefSeek aims to make academic information easily accessible to everyone. RefSeek searches more than one billion documents, including web pages, books, encyclopedias, journals, and newspapers.
G. Reinmann, and W. Sesink. Methodologie und Methoden medienpädagogischer Forschung. Jahrbuch Medienpädagogik 10, Springer Fachmedien, Wiesbaden, (2013)