@article{10_4064_am_19_3_4_629_634,
     author = {B. Zelinka},
     title = {Block-closed subgraphs and q-partitions of graphs},
     journal = {Applicationes Mathematicae},
     pages = {629--634},
     publisher = {mathdoc},
     volume = {19},
     number = {3-4},
     year = {1987},
     doi = {10.4064/am-19-3-4-629-634},
     zbl = {0721.05041},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-19-3-4-629-634/}
}