Petr Savický, Jiri Sgall. DNF tautologies with a limited number of occurrences of every variable. Theoretical Computer Science, 238(1-2):495-498, 2000. [doi]
@article{SavickyS00:0,
title = {DNF tautologies with a limited number of occurrences of every variable},
author = {Petr Savický and Jiri Sgall},
year = {2000},
doi = {10.1016/S0304-3975(00)00036-0},
url = {http://dx.doi.org/10.1016/S0304-3975(00)00036-0},
researchr = {https://researchr.org/publication/SavickyS00%3A0},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {238},
number = {1-2},
pages = {495-498},
}