**5. Concluding Remarks**

We have studied the strong metric dimension of cactus graphs in this work. Along the way, we have given several contributions to the realization and characterization results of strong resolving graphs involving cactus graphs. The results shown allow to observe that working in this topic for the specific case of cactus graphs is very challenging, although some particular structures of such graphs can be easier handled. These are the cases of unicyclic graphs, chains of even cycles and bouquet of cycles, for which we have given the constructions of their strong resolving graphs and bounds or closed formulas for the values of their strong metric dimensions. As a consequence of this study, the following open questions are raised.


**Funding:** This research received no external funding.

**Conflicts of Interest:** The author declares no conflict of interest.
