 There is no book-length study of the philosophy of Boethius of Dacia. A comprehensive treatment is found in Ebbesen 2002, but, being in Danish, it is accessible to rather few. A good short introduction is found in Pinborg 1974; see also Ebbesen 1998: 282–6. The main features of his thought are covered in Lanza and Toste 2011 and in Donati 2017. For Boethius’s theory of language, see in particular Pinborg 1967, Rosier (Rosier-Catach) 1983, Marmo 1994, Beuerle 2010.