@article{MASLO_1992__42_2_a0,
     author = {Borodin, Oleg V.},
     title = {Precise lower bound for the number of edges of minor weight in planar maps},
     journal = {Mathematica slovaca},
     pages = {129--142},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {1992},
     mrnumber = {1170097},
     zbl = {0767.05039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1992__42_2_a0/}
}