Karl Popper : The formative years 1902-1945 / Malachi Haim Hacohen. - Haim Hacohen, Malachi. (OLS)http://pul/name/58794; Haim Hacohen, Malachi. (OLS)http://pul/name/58794 (Cambridge Univerity Press, 2002)
Indice p.591-610.
Bibiografia p. 552-589.

Meditations and devotions of the late Cardinal Newman / [John Henry Newman]. - Ioannes Henricus Newman, santo, 1801-1890. (OLS)http://pul/name/8149 (Christian classics, 1975)