@article{CMUC_1990_31_1_a5,
     author = {Fri\v{c}, Roman},
     title = {On plane topologies with high sequential order},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {33--36},
     year = {1990},
     volume = {31},
     number = {1},
     mrnumber = {1056168},
     zbl = {0697.54014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1990_31_1_a5/}
}