Name
referees.display — Determines whether or not referees are visible in formatted
output
Applies To
This parameter controls the formatting of the referee
element in all output formats.
Possible Values
Possible values include 1 (display referees) and
0 (display alternate text).
1 (true)
Referees are displayed in formatted output.
0 (false)
The text of the referees.hidden.phrase
parameter (default: Available upon request.) is
displayed in place of referees.
interest.description.format 
XSL Parameter Reference