Protocol Gives Sites Way To Keep Out The 'Bots , Jeremy Carl, Web Week, Volume 1, Issue 7, November 1995
Robots in the Web: threat or treat? , Martijn Koster, ConneXions, Volume 9, No. 4, April 1995
Guidelines for Robot Writers , Martijn Koster, 1993
Evaluation of the Standard for Robots Exclusion , Martijn Koster, 1996