diff --git a/doc/index.md b/doc/index.md
index 8668b48..a1d712a 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -5,12 +5,16 @@
 *   [goals.md](goals.md) describes the goals of the project.
 *   [files.md](files.md) describes tests for which test vectors exists as well
     as the test vectors.
-*   [formsts.md](formats.md) describes the general format of the test vectors.
+*   [formats.md](formats.md) describes the general format of the test vectors.
 *   [types.md](types.md) describes the format of individial test vector files.
-    These formats are also described more formally using JSON schemas, which
-    are located in the directory wycheproof/schemas.
+    These formats are also described more formally using JSON schemas, which are
+    located in the directory wycheproof/schemas.
 *   [bugs.md](bugs.md) is a list of bugs.
 
+## GitHub source-code
+
+https://github.com/google/wycheproof
+
 ## Some common issues {#issues}
 * [RSA](rsa.md)
 * [DSA](dsa.md)