@article{10_4153_CMB_1987_050_6,
     author = {Ginsburg, John},
     title = {On the {Number} of {Maximal} {Elements} in a {Partially} {Ordered} {Set}},
     journal = {Canadian mathematical bulletin},
     pages = {351--357},
     year = {1987},
     volume = {30},
     number = {3},
     doi = {10.4153/CMB-1987-050-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1987-050-6/}
}