@article{10_4064_fm_158_1_81_93,
     author = {Saharon Shelah and Otmar Spinas},
     title = {The distributivity numbers of finite products of $\mathcal P(\ensuremath{\omega})/{\rm fin}$},
     journal = {Fundamenta Mathematicae},
     pages = {81--93},
     publisher = {mathdoc},
     volume = {158},
     number = {1},
     year = {1998},
     doi = {10.4064/fm-158-1-81-93},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-158-1-81-93/}
}