diff --git a/ProcessLib/HydroMechanics/HydroMechanicsFEM.h b/ProcessLib/HydroMechanics/HydroMechanicsFEM.h
index c91b80179a623ff2e91604dc67b73e62ab3dcd98..5de9a0705d4d705d23529657fd6173d0f7565bd8 100644
--- a/ProcessLib/HydroMechanics/HydroMechanicsFEM.h
+++ b/ProcessLib/HydroMechanics/HydroMechanicsFEM.h
@@ -352,7 +352,7 @@ private:
      * @param dxdot_dx        Value of \f$\dot{x} \cdot dx\f$.
      * @param dx_dx           Value of \f$ x \cdot dx\f$.
      * @param local_M_data    Mass matrix of an element, which takes the form of
-     *                        \f$ \inta N^T N\mathrm{d}\Omega\f$. Not used.
+     *                        \f$ \int N^T N\mathrm{d}\Omega\f$. Not used.
      * @param local_K_data    Laplacian matrix of an element, which takes the
      *         form of \f$ \int (\nabla N)^T K \nabla N\mathrm{d}\Omega\f$.
      *                        Not used.
@@ -387,7 +387,7 @@ private:
      * @param dxdot_dx        Value of \f$\dot{x} \cdot dx\f$.
      * @param dx_dx           Value of \f$ x \cdot dx\f$.
      * @param local_M_data    Mass matrix of an element, which takes the form of
-     *                        \f$ \inta N^T N\mathrm{d}\Omega\f$. Not used.
+     *                        \f$ \int N^T N\mathrm{d}\Omega\f$. Not used.
      * @param local_K_data    Laplacian matrix of an element, which takes the
      *         form of \f$ \int (\nabla N)^T K \nabla N\mathrm{d}\Omega\f$.
      *                        Not used.
diff --git a/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h b/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h
index bafa45af12a31031cad53f2834244a94b7153852..14380900d23f8a08f37d32772039c685e70f6bde 100644
--- a/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h
+++ b/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h
@@ -157,7 +157,7 @@ private:
      * @param dxdot_dx        Value of \f$\dot{x} \cdot dx\f$.
      * @param dx_dx           Value of \f$ x \cdot dx\f$.
      * @param local_M_data    Mass matrix of an element, which takes the form of
-     *                        \f$ \inta N^T N\mathrm{d}\Omega\f$. Not used.
+     *                        \f$ \int N^T N\mathrm{d}\Omega\f$. Not used.
      * @param local_K_data    Laplacian matrix of an element, which takes the
      *         form of \f$ \int (\nabla N)^T K \nabla N\mathrm{d}\Omega\f$.
      *                        Not used.
@@ -192,7 +192,7 @@ private:
      * @param dxdot_dx        Value of \f$\dot{x} \cdot dx\f$.
      * @param dx_dx           Value of \f$ x \cdot dx\f$.
      * @param local_M_data    Mass matrix of an element, which takes the form of
-     *                        \f$ \inta N^T N\mathrm{d}\Omega\f$. Not used.
+     *                        \f$ \int N^T N\mathrm{d}\Omega\f$. Not used.
      * @param local_K_data    Laplacian matrix of an element, which takes the
      *         form of \f$ \int (\nabla N)^T K \nabla N\mathrm{d}\Omega\f$.
      *                        Not used.
diff --git a/ProcessLib/ThermoMechanicalPhaseField/ThermoMechanicalPhaseFieldProcess.h b/ProcessLib/ThermoMechanicalPhaseField/ThermoMechanicalPhaseFieldProcess.h
index 85fbcc32cb036f60133ee6819cc9e65e58b32750..96b06ef12c2bf11d446a5daa8f2ff573151e52a1 100644
--- a/ProcessLib/ThermoMechanicalPhaseField/ThermoMechanicalPhaseFieldProcess.h
+++ b/ProcessLib/ThermoMechanicalPhaseField/ThermoMechanicalPhaseFieldProcess.h
@@ -42,7 +42,7 @@ struct ThermoMechanicalPhaseFieldLocalAssemblerInterface;
  *       &\varrho:&              \mbox{density,}\\
  *       &g_\mathrm{c}:&         \mbox{fracture energy,}\\
  *       &\varepsilon:&          \mbox{length scale}\\
- *       &\c_\mathrm{p}:&        \mbox{specific heat capacity in constant
+ *       &c_\mathrm{p}:&        \mbox{specific heat capacity in constant
  * pressure}\\
  *       &\kappa_\mathrm{eff}:&  \mbox{effectiev thermal conductivity}\\
  *    \f}