diff --git a/notes.md b/notes.md
index fcb55a7..6f65748 100644
--- a/notes.md
+++ b/notes.md
@@ -139,3 +139,4 @@
 2018-02-23T05:32:00 - Quick fix, referencing a known issue from the official repo (pulp-runtime)
 2018-02-23T18:58:00 - Minor doc updates: linking to article on quantization (pulp-runtime)
 2018-02-23T05:06:00 - Minor doc updates: linking to article on quantization (pulp-runtime)
+2018-03-18T05:59:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (pulp-runtime)