diff --git a/include/groups/Gal3.hpp b/include/groups/Gal3.hpp
index 5124119..c684df5 100644
--- a/include/groups/Gal3.hpp
+++ b/include/groups/Gal3.hpp
@@ -10,8 +10,8 @@
 // You can contact the authors at <alessandro.fornasier@ieee.org>,
 // <giulio.delama@ieee.org>.
 
-#ifndef Gal3_HPP
-#define Gal3_HPP
+#ifndef GAL3_HPP
+#define GAL3_HPP
 
 #include <array>
 
@@ -20,7 +20,7 @@
 namespace group
 {
 /**
- * @brief the Galileian group Gal(3). This is the Lie group of 3D rotations,
+ * @brief the Galilean group Gal(3). This is the Lie group of 3D rotations,
  * translations in space and time, and transformations between frames of reference
  * that differ only by constant relative motion.
  *
@@ -590,4 +590,4 @@ using Gal3f = Gal3<float>;   //!< The Gal3 group with single precision floating
 
 }  // namespace group
 
-#endif  // Gal3_HPP
+#endif  // GAL3_HPP
diff --git a/include/groups/TG.hpp b/include/groups/TG.hpp
index ca7f1be..7871bc1 100644
--- a/include/groups/TG.hpp
+++ b/include/groups/TG.hpp
@@ -200,7 +200,7 @@ class SEn3TG : public Tangent<SEn3<FPType, n>>
 
 /**
  * @brief The Gal3 Tangent group. This derived class represents the core components of the symmetry group
- * for equivariant IMU preintegration
+ * for equivariant IMU preintegration [preprint: https://arxiv.org/abs/2411.05548]
  *
  * @tparam FPType. Floating point type (float, double, long double)
  *