@article{BASM_2016_2_a8,
     author = {Wieslaw A. Dudek and Ali A. Talebi},
     title = {Operations on level graphs of bipolar fuzzy graphs},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {107--124},
     publisher = {mathdoc},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2016_2_a8/}
}