@article{10_4064_fm171_3_4,
     author = {Pierre Matet},
     title = {The covering number for category
 and partition relations on $P_{\omega} (\lambda )$},
     journal = {Fundamenta Mathematicae},
     pages = {235--247},
     publisher = {mathdoc},
     volume = {171},
     number = {3},
     year = {2002},
     doi = {10.4064/fm171-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm171-3-4/}
}