@article{SF_1970__1_133787,
     author = {C. Fennemore},
     title = {All varieties of bands.},
     journal = {Semigroup forum},
     pages = {172--179},
     publisher = {mathdoc},
     volume = {1},
     year = {1970},
     zbl = {0206.30401},
     url = {http://geodesic.mathdoc.fr/item/SF_1970__1_133787/}
}