@article{10_4064_fm177_3_2,
     author = {James H. Schmerl},
     title = {How many clouds cover the plane?},
     journal = {Fundamenta Mathematicae},
     pages = {209--211},
     publisher = {mathdoc},
     volume = {177},
     number = {3},
     year = {2003},
     doi = {10.4064/fm177-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm177-3-2/}
}