@article{SF_1988__37_1_134914,
     author = {Jorge Almeida},
     title = {Some pseudovariety joins involving the pseudovariety of finite groups.},
     journal = {Semigroup forum},
     pages = {53--58},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1988},
     zbl = {0633.20040},
     url = {http://geodesic.mathdoc.fr/item/SF_1988__37_1_134914/}
}