Update references.bib

Author: mhjensen

doc/src/FuturePlans/references.bib

@@ -36,4 +36,6 @@ @misc{mamedaliev2026frameworkevaluateperformancevariational
       archivePrefix={arXiv},
       primaryClass={quant-ph},
       url={https://arxiv.org/abs/2601.18812}, 
-}
+}
+
+Larocca, M., Thanasilp, S., Wang, S. et al. Barren plateaus in variational quantum computing. Nat Rev Phys 7, 174–189 (2025). https://doi.org/10.1038/s42254-025-00813-9