@article{10_4064_fm229_3_4,
     author = {W. R. Brian},
     title = {$P$-sets and minimal right ideals in $\mathbb {N}^{*}$},
     journal = {Fundamenta Mathematicae},
     pages = {277--293},
     publisher = {mathdoc},
     volume = {229},
     number = {3},
     year = {2015},
     doi = {10.4064/fm229-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm229-3-4/}
}