@article{10_4153_CJM_1986_012_8,
     author = {Berman, J. and Gr\"atzer, G. and Platt, C. R.},
     title = {Extending {Algebras} to {Model} {Congruence} {Schemes}},
     journal = {Canadian journal of mathematics},
     pages = {257--276},
     year = {1986},
     volume = {38},
     number = {2},
     doi = {10.4153/CJM-1986-012-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1986-012-8/}
}