diff --git a/preserves.md b/preserves.md
index 9ab1f2a..c30344d 100644
--- a/preserves.md
+++ b/preserves.md
@@ -896,6 +896,14 @@ specified, neither the textual nor the compact binary encoding rules
 for `Value`s force canonical serializations. Two serializations of the
 same `Value` may yield different binary `Repr`s.
 
+## Acknowledgements
+
+The use of low-order bits of each lead byte for the length of short
+values is inspired by a similar feature of [CBOR](http://cbor.io/).
+
+The treatment of commas as whitespace in the text syntax is inspired
+by the same feature of [EDN](https://github.com/edn-format/edn).
+
 ## Appendix. Table of lead byte values
 
      00 - False