diff --git a/README.md b/README.md
index 03bf1f0..e8775e6 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ This version is archived on Zenodo: [![DOI](https://zenodo.org/badge/DOI/10.5281
   variable file. Will open in Excel (or equivalent).
 - `LICENCE.md`: terms of use.
 
-Brief description of each feature:
+Brief description of each feature (see [1] for more details):
 
 | column name                  | description                                           |
 | ---------------------------- | ----------------------------------------------------- |
diff --git a/README.pdf b/README.pdf
index 71fea11..5851d70 100644
Binary files a/README.pdf and b/README.pdf differ