@article{LJM_2004_15_a1,
     author = {F. Katrno\v{s}ka},
     title = {Logics that are generated by idempotents},
     journal = {Lobachevskii journal of mathematics},
     pages = {11--19},
     publisher = {mathdoc},
     volume = {15},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2004_15_a1/}
}