@article{10_2298_FIL2010229S,
     author = {Josef \v{S}lapal},
     title = {A closure operator for the digital plane},
     journal = {Filomat},
     pages = {3229 },
     year = {2020},
     volume = {34},
     number = {10},
     doi = {10.2298/FIL2010229S},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2010229S/}
}