Update references.bib

Author: mjhajharia

examples/references.bib

@@ -62,3 +62,13 @@ @misc{carpenter2016hierarchical
   publisher={Technical report. Retrieved from https://mc-stan. org/users/docum entat ion~…}
 }
 
+@article{efron1975data,
+  title={Data analysis using Stein's estimator and its generalizations},
+  author={Efron, Bradley and Morris, Carl},
+  journal={Journal of the American Statistical Association},
+  volume={70},
+  number={350},
+  pages={311--319},
+  year={1975},
+  publisher={Taylor \& Francis}
+}