@article{SF_1982__24_134539,
     author = {F. Pastijn},
     title = {Inverse semigroup varieties generated by {E-unitary} semigroups.},
     journal = {Semigroup forum},
     pages = {87--88},
     publisher = {mathdoc},
     volume = {24},
     year = {1982},
     zbl = {0503.20023},
     url = {http://geodesic.mathdoc.fr/item/SF_1982__24_134539/}
}