Originally, the concept simply referred to society's ability to regulate itself.

The concept refers to all those facts of society which remain relatively constant over time.

The concept of moral rights refers to the idea that an author has a separate right over their works, in addition to copyright.

Moreover, there is a profound lack of agreement on what the concept actually refers to.

The concepts referred to are those of nature and that of freedom.

Not all concepts refer to concrete things: some like love, pride, time and weight are abstract.

This concept refers to the relative solubility of a given agent in blood.

In addition, concepts referred to in the text must be defined.

This concept refers to the blurring distinction between work and home social environments.

Employees expect a fair return for what they contribute to their jobs, a concept referred to as the "equity norm".