London: MacMillan Publishers, Inc. 1998 ISBN 0-333-73432-7 ISBN 1-56159-228-5* "Arrigo Enrico Boïto", "Opera Glass" Composer Index, (Stanford University) on opera.stanford.edu.
London: MacMillan Publishers, Inc. 1998 ISBN 0-333-73432-7 ISBN 1-56159-228-5* "Arrigo Enrico Boïto", "Opera Glass" Composer Index, (Stanford University) on opera.stanford.edu.