His work was occasionally referred to as "the art of death."

Despite this, it is occasionally referred to as a city.

As a result, it is occasionally referred to in the broader culture.

However, viruses are occasionally referred to as such in the popular press.

One man was speaking, referring occasionally to a file in front of him.

He occasionally refers to himself in his blog, which has become very popular.

Both works refer occasionally to the same subjects, but they are distinct, and in no way similar.

Parents and teachers were occasionally referred to, but no adult was ever pictured.

This chemistry is also occasionally referred to as "hot salt".

It was occasionally referred to by this name in official documentation until at least 1932.