diff --git a/无进位乘法和GHASH.md b/无进位乘法和GHASH.md
index 194508a..5a96fe2 100644
--- a/无进位乘法和GHASH.md
+++ b/无进位乘法和GHASH.md
@@ -5,11 +5,11 @@
 Cipher Modes of Operation: 
 Galois/Counter Mode (GCM) 
 and GMAC
-* Intel® Carry-Less 
+* [Intel® Carry-Less 
 Multiplication 
 Instruction and its 
 Usage for Computing 
-the GCM Mode
+the GCM Mode](https://www.intel.com/content/dam/develop/external/us/en/documents/clmul-wp-rev-2-02-2014-04-20.pdf)
 * Optimized Galois-Counter Mode implementation on Intel®
 Architecture 
 Processors