- my $next_itemnumber = $next_items[-1]->{itemnumber} if @next_items;
- my $next_biblionumber = $next_items[-1]->{biblionumber} if @next_items;
+ my (
+ $next_itemnumber, $next_biblionumber,
+ $prev_itemnumber, $prev_biblionumber
+ );
+
+ $next_itemnumber = $next_items[-1]->{itemnumber} if @next_items;
+ $next_biblionumber = $next_items[-1]->{biblionumber} if @next_items;