@article{10_1017_S0017089500003311,
     author = {McAlister, D. B.},
     title = {E-unitary inverse semigroups over semilattices},
     journal = {Glasgow mathematical journal},
     pages = {1--12},
     year = {1978},
     volume = {19},
     number = {1},
     doi = {10.1017/S0017089500003311},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003311/}
}