@article{PORMA_1992__49_1_115777,
     author = {Priestley, H.A. and Bordalo, G.},
     title = {Negation operations definable on finite distributive lattices},
     journal = {Portugaliae mathematica},
     pages = {37--49},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1992},
     mrnumber = {1165921},
     zbl = {0765.06014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1992__49_1_115777/}
}