Index: README.md
==================================================================
--- README.md
+++ README.md
@@ -10,11 +10,11 @@
 
 **GRG** understands tensors, spinors, vectors, differential forms and knows all standard operations with these quantities. Input form for mathematical expressions is very close to traditional mathematical notation including Einstein summation rule. **GRG** knows covariant properties of the objects: one can easily raise and lower indices, compute covariant and Lie derivatives, perform coordinate and frame transformations etc. **GRG** works in any dimension and allows one to represent tensor quantities with respect to holonomic, orthogonal and even any other arbitrary frame.
 
 One of the key features of **GRG** is that it knows a large number of built-in usual field-theoretical and geometrical quantities and formulas for their computation providing ready solutions to many standard problems.
 
-Another unique feature of **GRG** is that it can export results of calculations into other computer algebra system such as *Maple*, *Mathematica*, *Macsyma* or ***REDUCE*** in order to use these systems to proceed with analysis of the data. The *LaTeX* output format is supported as well. **GRG** is compatible with the **REDUCE** graphics shells providing nice book-quality output with Greek letters, integral signs, etc.
+Another unique feature of **GRG** is that it can export results of calculations into other computer algebra system such as *Maple*, *Mathematica*, *Macsyma*, or ***REDUCE*** in order to use these systems to proceed with analysis of the data. The *LaTeX* output format is supported as well. **GRG** is compatible with the **REDUCE** graphical shells, providing book-quality output with Greek letters, integral signs, etc.
 
 ----
 
 ## Features
 
@@ -42,10 +42,11 @@
 
 - [**GRG Homepage**](https://reduce-algebra.sourceforge.io/grg32/grg32.php)
 - [GitHub Mirror](https://github.com/reduce-algebra/grg/)
 - [SourceHut Mirror](https://git.sr.ht/~trn/grg/)
 - [NotABug Mirror](https://notabug.org/reduce-algebra/grg)
+- [Chisel Mirrpr](https://chiselapp.com/user/reduce-algebra/repository/grg)
 
 ----
 
 ## Documentation