Kasilingam Periyasamy Vangalur S. Alagar Adding Real-Time Filters to Object-Oriented Specification of Time Critical Systems. 28-39 1998 conf/wift/1998 WIFT http://csdl.computer.org/comp/proceedings/wift/1998/0081/00/00810028abs.htm db/conf/wift/wift1998.html#PeriyasamyA98