Wyniki
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Two systems of deontic logic
Andrea Loparic, Leila Z. Puga
Bulletin of the Section of Logic , 15 /4 (1986) s. 137-141 -
Logic with deontic and legal modalities : preliminary account
Leila Z. Puga, Newton C.A. da Costa
Bulletin of the Section of Logic , 16 /2 (1987) s. 71-75