@article{CMUC_2011_52_4_a10,
     author = {Stasyuk, I. and Tymchatyn, E. D.},
     title = {A continuous operator extending fuzzy ultrametrics},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {611--622},
     year = {2011},
     volume = {52},
     number = {4},
     mrnumber = {2864002},
     zbl = {1249.54018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2011_52_4_a10/}
}