especially if you only know OOP from languages like C++ or Java. If
on the other hand you are already familiar with CLOS, you should be
aware that @eieio{} does not implement the full CLOS specification and
-also differs in some other aspects (@xref{Introduction}, and @ref{CLOS
-compatibility}).
+also differs in some other aspects which are mentioned below (also
+@pxref{CLOS compatibility}).
@eieio{} supports the following features: