?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=R&rft.au=Hirsch%2C+R&rft.aulast=Hirsch&rft.issue=2&rft.title=Algebra+universalis&rft.date=May+2021&rft.atitle=Axioms+for+signatures+with+domain+and+demonic+composition&rft.volume=82&rft.genre=article