@article{SF_1993__47_2_135272,
     author = {R. Cacioppo},
     title = {Nonfinitely based pseudovarieties and inherently nonfinitely based varieties.},
     journal = {Semigroup forum},
     pages = {223--226},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1993},
     zbl = {0794.08007},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__47_2_135272/}
}