On formally undecidable propositions of Principia Mathematica ...
Kurt Gödel & Martin Hirzel
Yablo's Paradox and Beginningless Time
Laureano Luna
What Numbers Could Not Be
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Presocratic Philosophy: A Very Short Introduction
Catherine Osborne
Consumer cooperatives: uncovering the value potential of customer ...
Antti Talonen & Iiro Jussila & Hannu Saarijärvi & Timo Rintamäki