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https://taxi-sommerfeld-fritzsche.de/ Taxi-Mietwagenbetrieb Sommerfeld & Fritsche GmbH – Taxihotline 03661 87000 taxi sommerfeld fritsche gmbh 03661 https://arxiv.org/abs/1504.03661 [1504.03661] Resource convertibility and ordered commutative monoids Abstract page for arXiv paper 1504.03661: Resource convertibility and ordered commutative monoids 1504 03661 resource convertibility ordered