Stefano Berardi Ugo de'Liguoro Calculi, types and applications: Essays in honour of M. Coppo, M. Dezani-Ciancaglini and S. Ronchi Della Rocca. 1-11 2008 398 Theor. Comput. Sci. 1-3 http://dx.doi.org/10.1016/j.tcs.2008.01.018 db/journals/tcs/tcs398.html#Berardid08