@article{SEMR_2008_5_a8,
     author = {O. V. Borodin and A. O. Ivanova},
     title = {Planar graphs without triangular $4$-cycles are $3$-choosable},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {75--79},
     publisher = {mathdoc},
     volume = {5},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2008_5_a8/}
}