
His quintessential work on the subject is the book, Who Is My Mother? The Role and Status of the Mother of Jesus in the New Testament and Roman Catholicism.
Also, a few months ago, Dr. Svendsen was on Iron Sharpens Iron. Part one can be downloaded here, part two can be downloaded here. These broadcasts covered a wide range of topics on Roman Catholicism.
I greatly appreciate and highly recommend Dr. Svendsen's work on Roman Catholicism.