@article{MZ_1981__177_173057,
     author = {Victor J. Baston},
     title = {Inequalities {Involving} {Maps} of {Finite} {Sets.}},
     journal = {Mathematische Zeitschrift},
     pages = {207--210},
     publisher = {mathdoc},
     volume = {177},
     year = {1981},
     zbl = {0444.05013},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__177_173057/}
}