1. A note on error detection codes for asymmetric channels;Berger;Inform. and Contr.,1961
2. On the theory of binary asymmetric error correcting codes;Constantin;Inform. and Contr.,1979
3. Optimal error detection codes for completely asymmetric binary channels;Freiman;Inform. and Contr.,1962
4. Normalized matching in direct products of partial orders;Hsieh;Stud. Appl. Math.,1973
5. Families of subsets having no subset containing another with small difference;Katona;Nieuw Arch. Wisk.,1972