diff --git a/README.md b/README.md
index dd2dab9..1179d05 100644
--- a/README.md
+++ b/README.md
@@ -104,3 +104,12 @@ Application-defined HTTP status codes are generated in `AuthController` for succ
 | `note_shares` | `shared_with_user_id` | `UUID` | Yes | FK to `users(id)`; indexed by `idx_note_shares_shared_with_user_id` | User receiving read-only access. |
 | `note_shares` | `created_at` | `TIMESTAMP WITH TIME ZONE` | Yes |  | Share creation timestamp. |
 | `note_shares` | `note_id`, `shared_with_user_id` | `UUID`, `UUID` | Yes | Unique: `uq_note_shares_note_user` | Prevents duplicate shares for the same note and user. |
+
+
+## References
+
+A list of projects looked at for reference.
+- https://github.com/spring-petclinic/spring-petclinic-rest
+- https://github.com/spring-projects/spring-petclinic
+- https://github.com/gothinkster/spring-boot-realworld-example-app
+- https://github.com/spring-projects/spring-data-examples