Piergiorgio Bertoli Jacques Calmet Fausto Giunchiglia Karsten Homann Specification and Integration of Theorem Provers and Computer Algebra Systems. 94-106 1998 conf/aisc/1998 AISC http://link.springer.de/link/service/series/0558/bibs/1476/14760094.htm db/conf/aisc/aisc1998.html#BertoliCGH98