@inproceedings { 5147, title = {A product modal logic}, booktitle = {35th Linz Seminar on Fuzzy Set Theory}, year = {2014}, month = {18/02/2014}, pages = {127-130}, edition = {T. Flaminio et al.}, address = {Linz, Austria}, author = {Amanda Vidal and Francesc Esteva and Llu\'{\i}s Godo} }