notes: add more works

README.md

@@ -3,4 +3,19 @@ A set of educational notes that have been taken while studying.
 
 ## Index
 
-- **Linear Algebra notes** [linear_algebra.pdf](linear_algebra.pdf)
+- [English](#english)
+- [Italian](#italian)
+- [Latin](#latin)
+
+### English
+
+- **Linear Algebra notes** [linear_algebra.pdf](English/linear_algebra.pdf)
+
+### Italian
+
+- **Numeri cateriniani** [numeri_cateriniani.pdf](Italian/numeri_cateriniani.pdf)
+
+### Latin
+
+- **De parabola** [parabola.pdf](Latin/parabola.pdf)
+- **De polynomii maximis minimisque** [maximi_minimique.pdf](Latin/maximi_minimique.pdf)