diff --git a/README.md b/README.md
index 85d3643..5501b6b 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,2 @@
-1. Hutton's formula: [tex source](https://github.com/ulaulaman/tikzdraw/blob/master/hutton_formula.tex) | [pdf](https://github.com/ulaulaman/tikzdraw/blob/master/pdf/hutton_formula.pdf)
+* Hutton's formula: [tex source](https://github.com/ulaulaman/tikzdraw/blob/master/hutton_formula.tex) | [pdf](https://github.com/ulaulaman/tikzdraw/blob/master/pdf/hutton_formula.pdf)
+* Strassnitzky's formula: [tex source](https://github.com/ulaulaman/tikzdraw/blob/master/strassnitzky_formula.tex) | [pdf](https://github.com/ulaulaman/tikzdraw/blob/master/pdf/strassnitzky_formula.pdf)