@article{SF_1993__46_1_135229,
     author = {C. Vachuska},
     title = {On the lattice of completely regular monoid varieties.},
     journal = {Semigroup forum},
     pages = {168--186},
     year = {1993},
     volume = {46},
     number = {1},
     zbl = {0774.20037},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__46_1_135229/}
}