@article{AM2_1978__18_136789,
     author = {N.S. Mendelsohn},
     title = {The spectrum of idempotent varieties of algebras with binary operators based on two variable identities.},
     journal = {Aequationes mathematicae},
     pages = {330--332},
     publisher = {mathdoc},
     volume = {18},
     year = {1978},
     zbl = {0397.08006},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__18_136789/}
}