@article { IIIA-2002-480, title = {Subvarieties of BL-algebras generated by single-components chains}, journal = {Archive for Mathematical Logic}, volume = {41}, year = {2002}, pages = {673-685}, abstract = {In this paper we study and equationally characterize the subvarieties of BL, the variety of BL-algebras, which are generated by families of single-component BL-chains, i.e. MV-chains, Product-chain or Gödel-chains. Moreover, it is proved that they form a segment of the lattice of subvarieties of BL which is bounded by the Boolean variety and the variety generated by all single-component chains, called LnG.}, author = {Antonio Di Nola and Francesc Esteva and Pere Garc\'{\i}a and Llu\'{\i}s Godo and Salvatore Sessa} }