Samson Abramsky Coalgebras, Chu Spaces, and Representations of Physical Systems. 551-574 2013 42 J. Philos. Log. 3 https://doi.org/10.1007/s10992-013-9276-4 https://www.wikidata.org/entity/Q57006454 db/journals/jphil/jphil42.html#Abramsky13