Similarities with and differences between air and space law primarily in the field of private international law / by I.H.Ph. Diederiks-Verschoor. - Diederiks-Verschoor, Isabella Henrïetta Philepina. (OLS)http://pul/name/60411 (s. n.], 1981)
Bibliografia in nota.

Du protestantisme à l'Église / Louis Bouyer ; préface du R.P. Guy de Broglie. - Bouyer, Louis, C.Or., 1913-2004. (OLS)http://pul/name/722; Broglie, Guy de, S.I., 1889-1983. (OLS)http://pul/name/9175 (Les Éditions du Cerf, 1959)