On the Complexity of Finite Sorted Algebras.

Thierry Boy de la Tour On the Complexity of Finite Sorted Algebras. 95-108 http://link.springer.de/link/service/series/0558/bibs/1761/17610095.htm 1998 conf/ftp/1998 FTP (LNCS Selection) db/conf/ftp/ftp-lncs1998.html#Tour98