@Book{PDFRef, author = {{Adobe Systems Incorporated}}, title = {{PDF} Reference Version~1.6}, publisher = {Adobe Press}, year = 2004, key = {PDF}, edition = {Fifth}, month = dec # {~3,}, note = {ISBN~\mbox{0321304748}. Available from \url{http://partners.adobe.com/public/developer/en/pdf/PDFReference16.pdf}} } @Unpublished{MediaTypes, author = {{Internet Assigned Numbers Authority}}, title = {{MIME} Media Types}, note = {Available from \url{http://www.iana.org/assignments/media-types/}}, key = {IANA} } @TechReport{Freed1996, author = {N. Freed and N. Borenstein}, title = {{M}ultipurpose {I}nternet {M}ail {E}xtensions {(MIME)} Part Two: Media Types}, institution = {Internet Engineering Task Force (IETF), Network Working Group}, year = 1996, type = {Request for Comments (RFC)}, number = 2046, month = nov, note = {Available from \url{http://www.rfc-editor.org/rfc/rfc2046.txt}} }