@article{NSJOM_2004_34_2a_10,
     author = {L. Kwuida},
     title = {Congruences of 

 concept algebras},
     journal = {Novi Sad Journal of Mathematics},
     pages = {141-152},
     year = {2004},
     volume = {34},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2004_34_2a_10/}
}