@article{10_4064_fm_90_2_177_180,
     author = {N. Williams},
     title = {Tightly packed families of sots},
     journal = {Fundamenta Mathematicae},
     pages = {177--180},
     publisher = {mathdoc},
     volume = {90},
     number = {2},
     year = {1975},
     doi = {10.4064/fm-90-2-177-180},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-90-2-177-180/}
}