Nadeem Abdul Hamid Zhong Shao Valery Trifonov Stefan Monnier Zhaozhong Ni 89-100 2002 conf/lics/2002 LICS http://doi.ieeecomputersociety.org/10.1109/LICS.2002.1029819 db/conf/lics/lics2002.html#HamidSTMN02