She also introduced the concept of numbers, which seemed to make no sense to him whatever.

In this work he also introduced the concept of effective population size.

The concept was first introduced by a Seattle bank in 1973.

However, Country only recorded their first win five years after the concept was introduced, in 1992.

The concept of the foundation was introduced at a staff conference.

He introduced new concepts such as security community to the literature.

In an 1894 paper, he introduced the concept of the fundamental group.

In general, the model was improved with better data and new concepts were introduced.

The concept was introduced independently by two groups in 1994.

And there is his 1999 comedy special, which introduced the concept.