@article{PORMA_1989__46_4_115682,
     author = {Bordalo, G.},
     title = {A duality between unary algebras and their subuniverse lattices},
     journal = {Portugaliae mathematica},
     pages = {431--439},
     publisher = {mathdoc},
     volume = {46},
     number = {4},
     year = {1989},
     mrnumber = {1032512},
     zbl = {0689.06009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1989__46_4_115682/}
}