diff --git a/references_for_docker.md b/references_for_docker.md
index ab09c9b..8a80708 100644
--- a/references_for_docker.md
+++ b/references_for_docker.md
@@ -40,8 +40,13 @@ Remove stopped containers, dangling images, the build cache, and unused networks
 docker system prune
 ```
 
-### Learning
+### Tutorials and Articles
 
-##  Docker Certified Associate exam
+### Containers in General
+
+* [Container Technology Wiki ](https://www.aquasec.com/wiki/display/containers/).
+
+####  Docker Certified Associate exam
+
+* [250 Practice Questions for the DCA Exam](https://medium.com/bb-tutorials-and-thoughts/250-practice-questions-for-the-dca-exam-84f3b9e8f5ce).
 
-* [250 Practice Questions for the DCA Exam](https://medium.com/bb-tutorials-and-thoughts/250-practice-questions-for-the-dca-exam-84f3b9e8f5ce).
\ No newline at end of file
diff --git a/references_for_eks.md b/references_for_eks.md
index 6cec660..969a3ba 100644
--- a/references_for_eks.md
+++ b/references_for_eks.md
@@ -1,4 +1,10 @@
-# AWS EKS
+# AWS EKS 
+
+
+## Tutorials & Articles
+
+* [Provision a Kubernetes Cluster in Amazon EKS with Weaveworks eksctl and AWS CDK](https://blog.reactioncommerce.com/deploying-kubernetes-clusters-in-aws-eks-with-the-aws-cloud-development-kit/).
+
 
 ## Creating EKS cluster using the eksctl CLI
 
diff --git a/references_for_k8s.md b/references_for_k8s.md
index a96eb45..df6c415 100644
--- a/references_for_k8s.md
+++ b/references_for_k8s.md
@@ -63,3 +63,9 @@ Services objects allow pods to communicate with other pods.
 * [Are you Ready to Manage your Infrastructure like Google?](http://blog.jetstack.io/blog/k8s-getting-started-part1/).
 * [Google is years ahead when it comes to the cloud, but it's happy the world is catching up](http://www.businessinsider.in/Google-is-years-ahead-when-it-comes-to-the-cloud-but-its-happy-the-world-is-catching-up/articleshow/47793327.cms).
 * [Top Reasons Businesses Should Move to Kubernetes Now](http://supergiant.io/blog/top-reasons-businesses-should-move-to-kubernetes-now) .
+
+
+## Prometheus Operator
+
+* [Monitor external services with the prometheus operator](https://jpweber.io/blog/monitor-external-services-with-the-prometheus-operator/).
+* [Prometheus Operator — How to monitor an external service](https://devops.college/prometheus-operator-how-to-monitor-an-external-service-3cb6ac8d5acb).