@article{CMUC_1986__27_3_a2,
     author = {\v{C}uda, Karel},
     title = {A nonstandard treatment with quantities},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {437--447},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1986},
     mrnumber = {873618},
     zbl = {0617.03035},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1986__27_3_a2/}
}