Andreas Blass. Functional Thesauri, Classifying Topoi, Unification, and Flatness. In Andreas Blass, Patrick Cégielski, Nachum Dershowitz, Manfred Droste, Bernd Finkbeiner, editors, Fields of Logic and Computation III - Essays Dedicated to Yuri Gurevich on the Occasion of His 80th Birthday. Volume 12180 of Lecture Notes in Computer Science, pages 46-56, Springer, 2020. [doi]
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