ästhetik und Politik : Heinrich Heines Prosa / Albrecht Betz. - Betz, Albrecht. (OLS)http://pul/name/48070 (Carl Hanser, 1971)
Bibliografia in appendice.

Gaelic personal names / Donnchadh Ó Corráin, Fidelma Maguire. - Ó Corráin, Donnchadh. (OLS)http://pul/name/50741; Maguire, Fidelma. (OLS)http://pul/name/50742 (The Academy Press, 1981)