Andreas Gustavsson (8 January 2010), "Orgasmgaranti i Köln", ETC.se (in Swedish), archived from the original on 17 January 2010 (first published in 2006)
Andreas Gustavsson (8 January 2010), "Orgasmgaranti i Köln", ETC.se (in Swedish), archived from the original on 17 January 2010 (first published in 2006)