@article{PORMA_1988__45_1_115605,
     author = {Cerdeira, J. Orestes},
     title = {On the complexity of covering nodes by {K} node-disjoint cycles},
     journal = {Portugaliae mathematica},
     pages = {25--27},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {1988},
     mrnumber = {0952795},
     zbl = {0661.68037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1988__45_1_115605/}
}