Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page ZPP (complexity):

"

There exists an oracle relative to which ZPP = EXPTIME[citation needed]. A proof for ZPP = EXPTIME would imply that PZPP, as PEXPTIME (see time hierarchy theorem).