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Bullying beyond the schoolyard : preventing and responding to cyberbullying / Sameer Hinduja, Justin W. Patchin . Thousand Oaks : Corwin Press, 2009 . xvi, 254 s . ISBN 978-1-4129-6689-4 (brož.). ISBN 978-1-4129-6688-7 (váz.) .   [1, currently available 1]