During his life he published only one paper on the subject.

The next year he published a much longer paper in German on the same subject.

He wrote and published many other books on religious subjects.

Over the years he published 72 articles on the subject.

He published several papers in the 1920s and 1930s on the subject.

Smith published a large number of works on legal subjects.

As of 2007, more than 700 publications have been published on the subject.

By then he had also published his first piece on the subject of southern Italy.

Several books and survey papers have been published on the subject.

He's well known in the field, has published quite a lot on the subject.