Index: README.md
==================================================================
--- README.md
+++ README.md
@@ -26,11 +26,13 @@
 - Kinematics for time-like congruences.
 - Ideal and spin fluid.
 - Newman-Penrose formalism.
 - Gravitational equations for the theory with arbitrary gravitational Lagrangian in Riemann and Riemann-Cartan spaces.
 
-The detailed documentation including complete manual and short reference guide is provided.
+## Documentation
+
+- [Complete GRG Manual and Reference Guide](https://github.com/reduce-algebra/grg/tree/master/doc)
 
 ## Author
 
 ```text
 Vadim V. Zhytnikov