“P. Leupen, Philip of Leyden, a fourteenth-century jurist. A study of his life and treatise ’De cura reipublicae et sorte principantis’”, BMGN-LCHR, vol. 98, no. 1, pp. 88–90, Jan. 1983, doi: 10.18352/bmgn-lchr.2383.