?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Van+Wietmarschen&rft.au=Van+Wietmarschen%2C+H&rft.aufirst=H&rft.date=16+June+2021&rft.title=No%C3%BBs&rft.atitle=What+is+social+hierarchy%3F&rft.genre=article