Maćkowski, Tomasz. “Numismatics on the Border of Different Sciences. ‘Żetony’ or Tokens? Some Remarks on Modern Numismatic Terminology”. Acta Archaeologica Lodziensia, vol. 61, Dec. 2018, pp. 111-7, https://czasopisma.ltn.lodz.pl/Acta-Archaeologica-Lodziensia/article/view/2152.