Add reference to future section

chapters/classes.tex

@@ -281,7 +281,7 @@ \subsection{Acyclic Bindings of Constants and Structural Parameters}\label{acycl
 The unexpanded binding equations for constants in the translated model must be acyclic after flattening.
 Thus it is not possible to introduce equations for constants by cyclic dependencies.
 
-Structural parameters, on the other hand, cannot have cyclic dependencies by definition.
+Structural parameters, on the other hand, cannot have cyclic dependencies by definition (see \cref{component-variability-prefixes-discrete-parameter-constant}).
 Since variability rules do not allow constants to depend on structural parameters, this means that constants and structural parameters share the property that their declaration equations can be solved one at a time with the natural causality.
 
 \begin{example}