The study appears in the current issue of the journal Science.

Their study appears in the current issue of the journal Nature.

Now, a new study appears to make the relationship much more solid.

To be sure, the model has had a mixed record in the 13 years since their study appeared.

The new study appears to rule out such a possibility.

Twin studies of the modern kind did not appear until the 1920s.

This study appears not to have allowed for transactions costs.

While some later studies appeared to confirm a connection, many others did not.

One Australian study appears to have found such a correlation.

A landscape stretched away from them, right side up, and on such a level that the study appeared to be a ground floor room.