@article{10_14708_ma_v32i46_05_1237,
     author = {Witold Kosi\'nski and Piotr Prokopowicz},
     title = {Algebra of fuzzy numbers.},
     journal = {Mathematica Applicanda},
     pages = { 37--63},
     publisher = {mathdoc},
     volume = {32},
     number = {46/05},
     year = {2004},
     doi = {10.14708/ma.v32i46/05.1237},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v32i46/05.1237/}
}