Randall Dougherty. Open Sets Satisfying Systems of Congruences. J. Mathematical Logic, 1(2), 2001. [doi]
@article{Dougherty01a, title = {Open Sets Satisfying Systems of Congruences}, author = {Randall Dougherty}, year = {2001}, doi = {10.1142/S0219061301000107}, url = {https://doi.org/10.1142/S0219061301000107}, researchr = {https://researchr.org/publication/Dougherty01a}, cites = {0}, citedby = {0}, journal = {J. Mathematical Logic}, volume = {1}, number = {2}, }