diff --git a/Hardware_developement/5-Shapers/Readme.txt b/Hardware_developement/5-Shapers/Readme.txt
index a209690..3530982 100644
--- a/Hardware_developement/5-Shapers/Readme.txt
+++ b/Hardware_developement/5-Shapers/Readme.txt
@@ -1,9 +1,11 @@
-Here are PCBs and images of currently considered pulse shapers. 
-
-Shaper #1 PCBs and image are in the folder Shaper1_v0.
-
-Shaper #7 PCBs and image for the first version are in the folder Shaper7_v0. This shaper has  
-inductors with sharp edges.
-
-Shaper #7 PCBs and image for the second version are in the folder Shaper7_v1. This shaper has  
-inductors with smooth edges.
+Here are PCBs and images of currently considered pulse shapers. 
+
+Shaper #1 PCBs and image are in the folder Shaper1_v0. It follows the schematic shown in Fig.19 from 
+https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/raw/branch/main/Documents/O-ESD-02.pdf
+
+Shaper #7 PCBs and image for the first version are in the folder Shaper7_v0. This shaper has  
+inductors with sharp edges. It follows the schematic shown in Fig.31 from 
+https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/raw/branch/main/Documents/O-ESD-02.pdf
+
+Shaper #7 PCBs and image for the second version are in the folder Shaper7_v1. This shaper has inductors with smooth edges. It follows the schematic shown in Fig.31 from
+https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/raw/branch/main/Documents/O-ESD-02.pdf