In the Scandinavian JB Society's Tidning, number 48, Spring 2012, there are a few statements which should be commented on.
"Jussi Bjorling vs Enrico Caruso,"
Journal of the Jussi Björling Societies of the USA & UK: Vol. 22:
1, Article 10.
Available at: https://scholarsarchive.byu.edu/jussibjorlingsociety/vol22/iss1/10