^ abAdolf Sprudzs, Hague Academy of International Law, The Hague Scholars Index to Portraits, Biographies, and Principal Publications of Scholars Who Lectured at the Hague Academy of International Law from 1947 to 1966, (as published in Recueil des cours, tomes 70-117) (Chicago 1967) (University of Chicago Law School Library publications: bibliographies and guides to research, no. 2), University of Chicago Law School Library, 1967, page 2.
^P. Nagel, Who's who in Switzerland Including the Principality of Liechtenstein, Nagel Publishers, 1990, page 87 (ISBN2826308289).
^Obituary in Eindhovens Dagblad (NL), October 1997.