diff --git a/B-mass-model.md b/B-mass-model.md
index 7e33ebf..8e92eda 100644
--- a/B-mass-model.md
+++ b/B-mass-model.md
@@ -7,6 +7,18 @@ The fit model is base on RooFit **TODO**
 Before executing any part of the selection code involving the mass fit, it is needed to compile the files with the classes needed for the fit. 
 
 
+## Table of Contents
+* [Introduction](#introduction)
+* [Mass Fit compilation](#mass-fit-compilation)
+* [Adding double crystal ball and ExpGauss to RooFit](#adding-double-crystal-ball-and-expgauss-to-roofit)
+   * [RooDoubleCB compilation](#roodoublecb-compilation)
+   * [RooExpAndGauss compilation](#rooexpandgauss-compilation)
+* [Fit model description](#fit-model-description)
+   * [Signal](#signal)
+   * [Background](#background)
+* [Source files](#source-files)
+
+
 ## Mass Fit compilation
  Recompile mass fit