diff --git a/acdc-parser/README.adoc b/acdc-parser/README.adoc
index 74813aa..91cd025 100644
--- a/acdc-parser/README.adoc
+++ b/acdc-parser/README.adoc
@@ -11,3 +11,5 @@ I'll try to keep as close as possible to:
 * the behaviour/layout as described in the https://docs.asciidoctor.org/asciidoc/latest[AsciiDoc Language Documentation]
 
 WARNING: I don't yet follow the format of the ASG as described https://gitlab.eclipse.org/eclipse/asciidoc-lang/asciidoc-lang/-/tree/main/asg?ref_type=heads[here].
+
+NOTE: I took a few of the grammar rules from https://github.com/kober-systems/literate_programming_toolsuite/blob/master/asciidoctrine/src/reader/asciidoc.pest[here] - some were already a perfect match to what I had, others I adapted, others I had in different forms and simplified. Credit where credit is due!