With the onset of Alzheimer's disease, he produced no further works.

However, at the time of its creation, it was a relative failure and he wrote no further works for the theatre.

It is reported here with the addition of further works and character names according to the sources stated in footnotes.

A number of further works are attributed to him.

Of all his further works, this book was the most known to the general public.

He finally permitted himself to enjoy fame and attempted no further great works.

As a result, the plane did not enter production and further works were abandoned.

Many of his further works were published under at least five pseudonyms.

But it never progresses in any of the further works.

He enlarged the repertoire by further key works of the world opera literature.