@article{aup:/content/journals/10.5117/TVGESCH2020.4.016.VERS, author = "Verstegen, S.W. (Wybren)", title = "Charles J. Halperin, Ivan the Terrible. Free to Reward and Free to Punish", journal= "Tijdschrift voor Geschiedenis", year = "2020", volume = "133", number = "4", pages = "746-748", doi = "https://doi.org/10.5117/TVGESCH2020.4.016.VERS", url = "https://www.aup-online.com/content/journals/10.5117/TVGESCH2020.4.016.VERS", publisher = "Amsterdam University Press", issn = "2352-1163", type = "Journal Article", }