Cross-sperner families

Dániel Gerbner, Nathan Lemons, Cory Palmer, Balázs Patkós, Vajk Szécsi
2012 Studia scientiarum mathematicarum Hungarica (Print)  
doi:10.1556/sscmath.2011.1185 fatcat:r63zn3yx35fmhgqpbvb5oionvu