diff --git a/web/content/docs/benchmarks/creepbgra/CreepBRGa.md b/web/content/docs/benchmarks/creepbgra/CreepBRGa.md
index b3b7cb1a17774d86fd11308d291cfee63e8392d3..76bd21ac23c81bec8570649874c7470c4be02512 100644
--- a/web/content/docs/benchmarks/creepbgra/CreepBRGa.md
+++ b/web/content/docs/benchmarks/creepbgra/CreepBRGa.md
@@ -169,6 +169,7 @@ $$\begin{gathered}
 $$\begin{gathered}
 \sigma_z=2G(\epsilon_z^e-\epsilon_r^e)=2G(\epsilon_z^e-\epsilon_t^e)
 \end{gathered}$$
+with $\epsilon^e=\epsilon-\epsilon^c$,
 where superscript $e$ means elasticity and $c$ means creep. With the creep strain
 formulas that are presented in the above context, the analytical solutions
 of the other main strains are