diff --git a/acmpca/README.md b/acmpca/README.md
index db97ae6..f1a6a67 100644
--- a/acmpca/README.md
+++ b/acmpca/README.md
@@ -27,6 +27,8 @@ the ARN if completed.   You'll use the ARN for an AWS LB Listener.
 # Links
 * https://docs.aws.amazon.com/privateca/latest/userguide/UsingTemplates.html
 * https://docs.aws.amazon.com/privateca/latest/userguide/PcaIssueCert.html
+* https://github.com/cert-manager/aws-privateca-issuer#mapping-cert-manager-usage-types-to-aws-pca-template-arns
+* https://docs.aws.amazon.com/privateca/latest/userguide/pca-rbp.html
 
 ## Requirements
 
diff --git a/acmpca/main.tf b/acmpca/main.tf
index eec8676..1395621 100644
--- a/acmpca/main.tf
+++ b/acmpca/main.tf
@@ -27,6 +27,8 @@
 * # Links
 * * https://docs.aws.amazon.com/privateca/latest/userguide/UsingTemplates.html
 * * https://docs.aws.amazon.com/privateca/latest/userguide/PcaIssueCert.html
+* * https://github.com/cert-manager/aws-privateca-issuer#mapping-cert-manager-usage-types-to-aws-pca-template-arns
+* * https://docs.aws.amazon.com/privateca/latest/userguide/pca-rbp.html
 */
 
 locals {