Ingmar Ögren Ada 95 as a Base to Architect Systems in O4S<sup>TM</sup>. 76-87 1997 conf/adaEurope/1997 Ada-Europe db/conf/adaEurope/adaEurope1997.html#Ogren97 http://dx.doi.org/10.1007/3-540-63114-3_8