Sebastian Krafzik. (2016). Marcin Bukała, Risk And Medieval Negotium, Studies of the Attitude towards Entrepreneurship: from Peter the Chanter to Clarus Florentinus, Spoleto: Fondazione Centro italiano di studi sull’alto medioevo, 2014. GLOSSAE. European Journal of Legal History, (13), p. 685. Recuperado a partir de http://glossae.eu/glossaeojs/article/view/254