What has the author Ernst Bassermann written?

It seems you're asking about an author named Ernst Bassermann. However, there is no widely recognized author with that exact name. It's possible:

* The name is misspelled. Perhaps you meant a different author altogether. Could you double-check the spelling?

* The author is lesser known. It's possible this person wrote, but not widely published.

* The author focused on a specific niche. Maybe their work is within a very specialized field, such as academic writing or a specific language.

To help me find the right author, please provide more information if possible:

* Any other details about the author: nationality, time period they lived in, any genres they might have written in.

* Any specific works you might have heard of.

With more information, I can help you find the right author and their works.