@article{10_1017_S0017089500007503,
     author = {Blyth, T. S. and Noor, A. S. A. and Varlet, J. C.},
     title = {Equational bases for subvarieties of double {MS-algebras}},
     journal = {Glasgow mathematical journal},
     pages = {1--16},
     year = {1989},
     volume = {31},
     number = {1},
     doi = {10.1017/S0017089500007503},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007503/}
}