Two-valued states on a concrete logic and the additivity problem
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Mirko Navara (1984)
Mathematica Slovaca
Kalnins, Ernie G., Miller, Willard jun., Post, Sarah (2011)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
А.Н. Кириллов (1985)
Zapiski naucnych seminarov Leningradskogo
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