Andrzej Wronski The Distance Function in Commutative l-semigroups and the Equivalence in Lukasiewicz Logic. [Citation Graph (0, 0)][DBLP] Studia Logica, 2004, v:77, n:2, pp:241-253 [Journal]
Tomasz Kowalski Semisimplicity, EDPC and Discriminator Varieties of Residuated Lattices. [Citation Graph (0, 0)][DBLP] Studia Logica, 2004, v:77, n:2, pp:255-265 [Journal]