On triangular norm based axiomatic extensions of the weak nilpotent minimum logic.

Carles Noguera Francesc Esteva Joan Gispert On triangular norm based axiomatic extensions of the weak nilpotent minimum logic. 387-409 2008 54 Math. Log. Q. 4 http://dx.doi.org/10.1002/malq.200710054 db/journals/mlq/mlq54.html#NogueraEG08