diff --git a/doc/doxygen/dumux.bib b/doc/doxygen/dumux.bib
index 770bee3928a0655b0a9a39a6b080d95f9f7263d7..987c42191e7181995eb5a1975fed6b6f163baeb0 100644
--- a/doc/doxygen/dumux.bib
+++ b/doc/doxygen/dumux.bib
@@ -2101,3 +2101,16 @@ author = {F. Fichot and F. Duval and N. Trégourès and C. Béchaud and M. Quint
   title = {Numerical Calculation of Time-Dependent Viscous Incompressible Flow of Fluid with Free Surface},
   journal = {Physics of Fluids}
 }
+
+@article{Birch1940,
+  title = {The thermal conductivity of rocks and its dependence upon temperature and composition},
+  volume = {238},
+  ISSN = {0002-9599},
+  DOI = {10.2475/ajs.238.8.529},
+  number = {8},
+  journal = {American Journal of Science},
+  publisher = {American Journal of Science (AJS)},
+  author = {Birch,  A. F. and Clark,  H.},
+  year = {1940},
+  pages = {529–558}
+}
diff --git a/dumux/material/components/granite.hh b/dumux/material/components/granite.hh
index 482bdd414d7e481f2adb8cc2d2d6b99d95cdd085..a83e95a1d1d83d7279af8cc69efa6bdd24bd5f1f 100644
--- a/dumux/material/components/granite.hh
+++ b/dumux/material/components/granite.hh
@@ -67,11 +67,8 @@ public:
 
     /*!
      * \brief Thermal conductivity of the component \f$\mathrm{[W/(m*K)]}\f$ as a solid.
-     * source: Birch, Albert Francis, and Harry Clark. "The thermal conductivity of rocks
-     *  and its dependence upon temperature and composition."
-     * American Journal of Science 238.8 (1940): 529-558.
-     * https://doi.org/10.2475/ajs.238.8.529
-     * Table 6: lambda(T=273.15 K)=6.6 cal/(cm*s*degC) and 1 cal /(cm*s*degC) = 418.4 W/(m*K)
+     * \note Birch & Clark (1940) \cite Birch1940
+     *       Table 6: lambda(T=273.15 K)=6.6 cal/(cm*s*degC) and 1 cal/(cm*s*degC)=418.4 W/(m*K)
      * \param temperature temperature of component in \f$\mathrm{[K]}\f$
      */
     static Scalar solidThermalConductivity(Scalar temperature)