Where to Get Studies in System Dynamics ( please suggest here )

This contains a large amount of studies, since the 1980s up to today:

https://proceedings.systemdynamics.org/

Some years will not have papers (2017 and later).
Be sure to find the paper, abstract, and supplement (if any). Supplements often contain models.

The other source (includes most of the proceedings entries) is the SD Bibliography. Find it at: https://systemdynamics.org/bibliography/