Shih-Chien Chou Jason Jen-Yen Chen Process program change control in a process environment. 175-197 2000 30 Softw., Pract. Exper. 3 db/journals/spe/spe30.html#ChouC00 http://dx.doi.org/10.1002/(SICI)1097-024X(200003)30:3<175::AID-SPE294>3.0.CO;2-M