Medieval Political Ideas / by Ewart Lewis. - Lewis, Ewart. (OLS)http://pul/name/40102 (Cooper, 1974)
Contiene indici.

Kant über Recht / Wolfgang Kersting. - Kersting, Wolfgang. (OLS)http://pul/name/54501 (Mentis, 2004)
Incluso indice.
Bibliografia in nota.