@article{MASLO_1999_49_1_a0,
     author = {Dolecki, Szymon},
     title = {Flexible niveloids},
     journal = {Mathematica slovaca},
     pages = {1--16},
     year = {1999},
     volume = {49},
     number = {1},
     mrnumber = {1804467},
     zbl = {0945.49011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1999_49_1_a0/}
}