@article{CMUC_2014__55_2_a1,
     author = {Catumba, Jorge and D{\'\i}az, Rafael},
     title = {Boolean differential operators},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {141--158},
     publisher = {mathdoc},
     volume = {55},
     number = {2},
     year = {2014},
     mrnumber = {3193921},
     zbl = {06391533},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2014__55_2_a1/}
}