cplusplus
diff --git a/‎source/classes.tex
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+7-3Lines changed: 7 additions & 3 deletions b/‎source/classes.tex
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+7-3Lines changed: 7 additions & 3 deletions
@@ -2264,11 +2264,15 @@
 \tcode{virtual}\iref{class.virtual}
 or pure
 \tcode{virtual}\iref{class.abstract}.
+\begin{note}
 If the destructor of a class is virtual and
 any objects of that class or any derived class are created in the program,
-the destructor shall be defined.
-If a class has a base class with a virtual destructor, its  destructor
-(whether user- or implicitly-declared) is virtual.
+the destructor shall be defined; see~\ref{basic.def.odr}.
+\end{note}
+\begin{note}
+If a class has a base class with a virtual destructor, its destructor
+(whether user- or implicitly-declared) is virtual\iref{class.virtual}.
+\end{note}
 
 \pnum
 \begin{note}