Natural deduction system for three-valued Heyting’s logic
Crossref DOI link: https://doi.org/10.3103/S002713221703007X
Published Online: 2017-07-01
Published Print: 2017-05
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Petrukhin, Ya. I.
License valid from 2017-05-01