Arnold Knopfmacher, Richard Warlimont. Covers of finite sets with distinct block sizes. Ars Comb., 44, 1996.
@article{KnopfmacherW96,
title = {Covers of finite sets with distinct block sizes},
author = {Arnold Knopfmacher and Richard Warlimont},
year = {1996},
researchr = {https://researchr.org/publication/KnopfmacherW96},
cites = {0},
citedby = {0},
journal = {Ars Comb.},
volume = {44},
}