* [http://www.math.uni-bonn.de/people/fotfs/ Interdisciplinary conferences — ''Foundations of the Formal Sciences''][http://en.wikipedia.org/w/index.php?title=Formal_science&action=edit]
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* [https://www.math.uni-bonn.de/people/fotfs/ Interdisciplinary conferences — ''Foundations of the Formal Sciences''][https://en.wikipedia.org/w/index.php?title=Formal_science&action=edit]