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Consistent posets.
Chajda I, Länger H. Chajda I, et al. Soft comput. 2021;25(15):9765-9772. doi: 10.1007/s00500-021-05906-y. Epub 2021 Jun 15. Soft comput. 2021. PMID: 34744501 Free PMC article.
Sheffer operation in relational systems.
Chajda I, Länger H. Chajda I, et al. Soft comput. 2022;26(1):89-97. doi: 10.1007/s00500-021-06466-x. Epub 2021 Nov 17. Soft comput. 2022. PMID: 35058735 Free PMC article.
Convex congruences.
Chajda I, Länger H. Chajda I, et al. Soft comput. 2017;21(19):5641-5645. doi: 10.1007/s00500-016-2306-8. Epub 2016 Aug 9. Soft comput. 2017. PMID: 29026344 Free PMC article.
The logic induced by effect algebras.
Chajda I, Halaš R, Länger H. Chajda I, et al. Soft comput. 2020;24(19):14275-14286. doi: 10.1007/s00500-020-05188-w. Epub 2020 Jul 26. Soft comput. 2020. PMID: 32968356 Free PMC article.