@article{ADM_2020_30_1_a3,
     author = {S. Bardyla and O. Gutik},
     title = {On the lattice of weak topologies on the bicyclic monoid with adjoined zero},
     journal = {Algebra and discrete mathematics},
     pages = {26--43},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2020_30_1_a3/}
}