Ver: http://books.google.com.ar/books?id=Stj5OgNu5RYC&pg=PT138&dq=iohannes+de+asberna&hl=es&ei=7CRlTcjJDcOAlAf39IiMBg&sa=X&oi=book_result&ct=result&resnum=2&ved=0CCkQ6AEwAQ#v=onepage&q=iohannes%20de%20asberna&f=false