@article{SF_1996__52_3_135435,
     author = {P.G. Trotter and M.V. Volkov},
     title = {The finite basis problem in the pseudovariety joins of aperiodic semigroups with groups.},
     journal = {Semigroup forum},
     pages = {83--92},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1996},
     zbl = {0845.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135435/}
}