@article{RO_2018__52_1_305_0,
     author = {Paschos, Vangelis Th.},
     title = {Combinatorial approximation of maximum k-vertex cover in bipartite graphs within ratio~0.7},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {305--314},
     publisher = {EDP-Sciences},
     volume = {52},
     number = {1},
     year = {2018},
     doi = {10.1051/ro/2017085},
     zbl = {1401.05238},
     mrnumber = {3812482},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ro/2017085/}
}