Chung-Hsien Wu Hung-Yu Su Yu-Hsien Chiu Chia-Hung Lin Transfer-based statistical translation of Taiwanese sign language using PCFG. 2007 6 ACM Trans. Asian Lang. Inf. Process. 1 http://doi.acm.org/10.1145/1227850.1227851 db/journals/talip/talip6.html#WuSCL07