\begin{equation}
\mathit{resp\_maint\_leaf}=\mathit{coeff\_maint(leaf)}\cdot \mathit{leaf\_biomass}\cdot\frac{ (0.3\cdot \mathit{LAI}+1.4\cdot (1.0-e^{-0.5\cdot \mathit{LAI}}))}{\mathit{LAI}}
\end{equation}