Other tools have been designed around particular techniques , such as finite state machines ( Karttunen et al. , 1997 ; Mohri et al. , 1998 ) .
a rational design for a weighted finitestate transducer library
Mehryar Mohri Fernando C N Pereira Michael Riley
This gives a greater flexibility but the tradeoff is that these tools can run very slowly . Other tools have been designed around particular techniques , such as finite state machines ( Karttunen et al. , 1997 ; Mohri et al. , 1998 ) . However , the source code for these tools is not freely available , so they can not be extended .
Other tools have been designed around particular techniques , such as finite state machines ( Karttunen et al. , 1997 ; @@CITATION ) .