?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=D%C3%B6ring&rft.aufirst=Leif&rft.au=D%C3%B6ring%2C+Leif&rft.volume=377&rft.title=Transactions+of+the+American+Mathematical+Society&rft.pages=7699-7752&rft.date=2024&rft.atitle=Markov+additive+friendships&rft.genre=article