L. Masinter; D. Wing; et al. <a href="http://www.ietf.org/rfc/rfc2534"><cite>Media Features for Display, Print, and Fax.</cite></a> March 1999. Internet RFC 2534. URL: <a href="http://www.ietf.org/rfc/rfc2534">http://www.ietf.org/rfc/rfc2534</a>