@article{10_4153_CJM_1973_036_9,
     author = {Gaskill, H. S.},
     title = {Classes of {Semilattices} {Associated} with an {Equational} {Class} of {Lattices}},
     journal = {Canadian journal of mathematics},
     pages = {361--365},
     year = {1973},
     volume = {25},
     number = {2},
     doi = {10.4153/CJM-1973-036-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-036-9/}
}