Man-reference-regexp

Man-reference-regexp is a variable defined in `man.el'.
Its value is

"\\([-a-zA-Z0-9_­+][-a-zA-Z0-9_.:­+]*\\(\n[ 	]+[-a-zA-Z0-9_­+][-a-zA-Z0-9_.:­+]*\\)*\\)[ 	]*(\\([0-9][a-zA-Z0-9+]*\\|[LNln]\\))"

Documentation:
Regular expression describing a reference to another manpage.