Blanc 1844, p. 166: "Although he was known by the name of his origin, this is an excerpt from an Italian language grammar in German, which describe in short this term as follows; [...] or the baptismal name was omitted altogether and simply said: il Certaldése, the one from Certaldo (Boccaccio) [...]." Blanc, Ludwig G. (1844). "Die Eigennamen" [The proper names]. Grammatik der italienischen Sprache [Italian language grammar] (in German). Halle: Carl August Schwetschke und Sohn.
Farrell, Thomas (2003). "Source or Hard Analogue? 'Decameron X, 10' and the 'Clerk's Tale'". The Chaucer Review. 37 (4): 346–364. doi:10.1353/cr.2003.0011. S2CID161342485.
Farrell, Thomas (2003). "Source or Hard Analogue? 'Decameron X, 10' and the 'Clerk's Tale'". The Chaucer Review. 37 (4): 346–364. doi:10.1353/cr.2003.0011. S2CID161342485.