@article{DMGAA_2001_21_1_a0,
     author = {Horv\'ath, Eszter},
     title = {The {S{\l}upecki} criterion by duality},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {5--11},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2001_21_1_a0/}
}