@article{IVM_2007_3_a10,
     author = {I. V. Germashev and V. E. Derbisher},
     title = {Properties of unimodal membership functions in operations with fuzzy sets},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {77--80},
     publisher = {mathdoc},
     number = {3},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2007_3_a10/}
}