diff --git a/Note-research.md b/Note-research.md
index cec4c25..1a11128 100644
--- a/Note-research.md
+++ b/Note-research.md
@@ -3,6 +3,7 @@ Papers that have had more or less influence on Rust, or which one might want to
 ## Type system
 
 * [Region based memory management in Cyclone](http://209.68.42.137/ucsd-pages/Courses/cse227.w03/handouts/cyclone-regions.pdf)
+* [Safe manual memory management in Cyclone](http://www.cs.umd.edu/projects/PL/cyclone/scp.pdf)
 * [Typeclasses: making ad-hoc polymorphism less ad hoc](http://www.ps.uni-sb.de/courses/typen-ws99/class.ps.gz)
 * [Macros that work together](https://www.cs.utah.edu/plt/publications/jfp12-draft-fcdf.pdf)
 * [Traits: composable units of behavior](http://scg.unibe.ch/archive/papers/Scha03aTraits.pdf)