@article{ISU_2013_13_4_a6,
     author = {V. K. Kartashov and A. V. Kartashova and V. N. Ponomarjov},
     title = {On conditions for distributivity or modularity of congruence lattices of commutative unary algebras},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {52--57},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2013_13_4_a6/}
}