Landwehr, C. E., "Best Available Technologies for Computer Security,"  
  IEEE COMPUTER, Vol. 16, No. 7 (July 1983), pp.86-100. [Reprinted in Advances 
  in Computer System Security, Volume II, Rein Turn, Ed., Artech House,
  Dedham, MA, 1984, pp. 76-107.]
<P>