@article{AMUC2_2000__69_1_120865,
     author = {Stacho, L.},
     title = {Degrees, neighbourhoods and closure operations.},
     journal = {Acta Mathematica Universitatis Comenianae. New Series},
     pages = {71},
     publisher = {mathdoc},
     volume = {69},
     number = {1},
     year = {2000},
     zbl = {0958.05073},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AMUC2_2000__69_1_120865/}
}