Sentence examples for previous studies were from inspiring English sources

Previous studies were conducted before 2008.

Improvements from previous studies were done [1].

Archived lamellar samples collected during two previous studies were used.

Most previous studies were based on poroelastic seabed model.

Measured data from previous studies were used for model validation.

However, the findings of previous studies were inconsistent.

Additionally, the effects on the microstructure of concrete and mortar in the previous studies were discussed.

Most of the previous studies were carried out by using pulse duration in the nanosecond range.

For the latter case, however, previous studies were confined to annular domains.

However, all of these previous studies were focused upon the simple-structured single-tubing wells.

Indeed, most previous studies were small size studies, uncontrolled and monocentric.