diff --git a/README.md b/README.md
index 44ee4b4..206ae8e 100644
--- a/README.md
+++ b/README.md
@@ -218,8 +218,6 @@ An updated and curated list of selected readings to illustrate High Scalability,
 	* [Scaling PostgreSQL Using CUDA](http://highscalability.com/blog/2009/5/28/scaling-postgresql-using-cuda.html)
 	* [Scaling Distributed Joins](http://blog.memsql.com/scaling-distributed-joins/)
 	* [MySQL System Design at Booking.com](https://www.percona.com/live/mysql-conference-2015/sessions/bookingcom-evolution-mysql-system-design)
-	* [MySQL Parallel Replication (4 parts) at Booking.com](https://medium.com/booking-com-infrastructure/evaluating-mysql-parallel-replication-part-4-annex-under-the-hood-eb456cf8b2fb)
-	* [Partitioning Main MySQL Database at Airbnb](https://medium.com/airbnb-engineering/how-we-partitioned-airbnb-s-main-database-in-two-weeks-55f7e006ff21)
 	* [PostgreSQL at Twitch](https://blog.twitch.tv/how-twitch-uses-postgresql-c34aa9e56f58)
 	* [Scaling MySQL-based Financial Reporting System at Airbnb](https://medium.com/airbnb-engineering/tracking-the-money-scaling-financial-reporting-at-airbnb-6d742b80f040)
 	* [Scaling MySQL at Wix](https://www.wix.engineering/single-post/scaling-to-100m-mysql-is-a-better-nosql)
@@ -227,12 +225,16 @@ An updated and curated list of selected readings to illustrate High Scalability,
 	* [Handling Growth with Postgres at Instagram](https://engineering.instagram.com/handling-growth-with-postgres-5-tips-from-instagram-d5d7e7ffdfcb)
 	* [Scaling the Analytics Database (Postgres) at TransferWise](http://tech.transferwise.com/scaling-our-analytics-database/)
 	* [Updating a 50 Terabyte PostgreSQL Database at Adyen](https://medium.com/adyen/updating-a-50-terabyte-postgresql-database-f64384b799e7)
-	* [Mitigating MySQL Replication Lag and Reducing Read Load at Github](https://githubengineering.com/mitigating-replication-lag-and-reducing-read-load-with-freno/)
+	* [Replication](https://m.alphasights.com/a-primer-on-database-replication-381b319cd032)		
+		* [MySQL Parallel Replication (4 parts) at Booking.com](https://medium.com/booking-com-infrastructure/evaluating-mysql-parallel-replication-part-4-annex-under-the-hood-eb456cf8b2fb)
+		* [Mitigating MySQL Replication Lag and Reducing Read Load at Github](https://githubengineering.com/mitigating-replication-lag-and-reducing-read-load-with-freno/)
+		* [Black-Box Auditing: Verifying End-to-End Replication Integrity between MySQL and Redshift at Yelp](https://engineeringblog.yelp.com/2018/04/black-box-auditing.html)
 	* [Sharding (Horizontal Partitioning)](https://www.educative.io/collection/page/5668639101419520/5649050225344512/5146118144917504)
 		* [Sharding MySQL at Pinterest](https://medium.com/@Pinterest_Engineering/sharding-pinterest-how-we-scaled-our-mysql-fleet-3f341e96ca6f)
 		* [Sharding MySQL at MailChimp](https://devs.mailchimp.com/blog/using-shards-to-accommodate-millions-of-users/)
 		* [Sharding MySQL (3 parts) at Evernote](https://blog.evernote.com/tech/2015/10/08/the-great-shard-migration-part-ii/)
-		* [Sharding Layer of Schemaless Datastore at Uber](https://eng.uber.com/schemaless-rewrite/)			
+		* [Sharding Layer of Schemaless Datastore at Uber](https://eng.uber.com/schemaless-rewrite/)
+		* [Partitioning Main MySQL Database at Airbnb](https://medium.com/airbnb-engineering/how-we-partitioned-airbnb-s-main-database-in-two-weeks-55f7e006ff21)			
 * [NoSQL Databases](https://www.thoughtworks.com/insights/blog/nosql-databases-overview)
 	* [Key-Value Databases (DynamoDB, Voldemort, Manhattan)](http://highscalability.com/anti-rdbms-list-distributed-key-value-stores)
 		* [Scaling Mapbox infrastructure with DynamoDB Streams](https://blog.mapbox.com/scaling-mapbox-infrastructure-with-dynamodb-streams-d53eabc5e972)
@@ -384,11 +386,6 @@ An updated and curated list of selected readings to illustrate High Scalability,
 	* [The Evolution of Global Traffic Routing and Failover](https://www.usenix.org/conference/srecon16/program/presentation/heady)
 	* [Testing for Disaster Recovery Failover Testing](https://www.usenix.org/conference/srecon17asia/program/presentation/liu_zehua)
 	* [Designing a Microservices Architecture for Failure](https://blog.risingstack.com/designing-microservices-architecture-for-failure/)
-* [Replication](https://m.alphasights.com/a-primer-on-database-replication-381b319cd032)
-	* [Master-Slave](https://engineering.bitnami.com/articles/enabling-additional-nodes-to-bitnami-mysql-with-replication.html)
-	* [Tree Replication](https://link.springer.com/chapter/10.1007/3-540-44863-2_47)
-	* [Master-Master](http://sabbour.me/highly-available-and-scalable-master-master-mysql-on-azure-virtual-machines/)
-	* [Buddy Replication](https://developer.jboss.org/wiki/JBossCacheBuddyReplicationDesign)
 * [Availability in Globally Distributed Storage Systems](http://static.googleusercontent.com/media/research.google.com/en/us/pubs/archive/36737.pdf)	
 * [NodeJS High Availability at Yahoo](https://yahooeng.tumblr.com/post/68823943185/nodejs-high-availability)
 * [Every Day Is Monday in Operations (11 parts) at LinkedIn ](https://www.linkedin.com/pulse/introduction-every-day-monday-operations-benjamin-purgason)