refer(1) on Linux
The text 47ef6f2be631, as Debian 9 (Stretch) shipped it.
preprocess bibliographic references for groff
Flags it lists
-
-B -
-C -
-P -
-R -
-S -
-a -
-b -
-c -
-e -
-f -
-i -
-k -
-l -
-n -
-p -
-s -
-t -
-v