Adding some blog posts

README.md

@@ -521,6 +521,10 @@ A list of external resources such as blog posts and videos, discussing 1BRC and
 * [One Billion Row Challenge & Azure Data Explorer](https://nielsberglund.com/post/2024-01-28-one-billion-row-challenge--azure-data-explorer/), by Niels Berglund (blog post)
 * [One Billion Row Challenge - view from sidelines](https://www.chashnikov.dev/post/one-billion-row-challenge-view-from-sidelines), by Leo Chashnikov (blog post)
 * [1 billion row challenge in SQL and Oracle Database](https://geraldonit.com/2024/01/31/1-billion-row-challenge-in-sql-and-oracle-database/), by Gerald Venzl (blog post)
+* [One Billion Row Challenge: Learned So Far](https://gamlor.info/posts-output/2024-01-12-one-billion-row-challenge/en/), by Roman Stoffel (blog post)
+* [One Billion Row Challenge in Racket](https://defn.io/2024/01/10/one-billion-row-challenge-in-racket/), by Bogdan Popa (blog post)
+* [The 1 Billion row challenge with Singlestore](https://medium.com/@testily/the-1-billion-row-challenge-with-singlestore-224ce97e451f), by Anna Semjen (blog post)
+* [https://hotforknowledge.com/2024/01/13/1brc-in-dotnet-among-fastest-on-linux-my-optimization-journey/](1BRC in .NET among fastest on Linux: My Optimization Journey), by Victor Baybekov (blog post)
 
 ## License