Porter, Andrew (1989) [https://books.google.com/books?id=vW20AAAAIAAJ&q=%22Celestina+Boninsegna%22&dq=%22Celestina+Boninsegna%22&lr=&pgis=1 Musical Events: A Chronicle, 1983–1986 Summit Books, p. 345. ISBN 0-671-63537-9