Notation Reference:
@ref{Chord notation},
@ref{Articulations and ornamentations},
-@ref{Relative octave entry}
+@ref{Relative octave entry},
@ref{Multiple voices}.
Snippets:
Depending on the situation, better representations might involve
@itemize
+
@item
temporary use of @ref{Multiple voices},
@samp{<< f! \\ <e fis!> >>},