Marc I. Kellner Bill Curtis Tom DeMarco Kouichi Kishida Maurice Schlumberger Colin Tully Non-Technological Issues in Software Engineering. 144-146 1991 conf/icse/1991 ICSE http://portal.acm.org/citation.cfm?id=256664.256728 db/conf/icse/icse91.html#KellnerCDKST91