Mentions summons (5)
I believe the answer is:
cites
I believe this is a double definition.
'mentions' is the first definition.
('cite' can be a synonym of 'mention')
'summons' is the second definition.
('cite' can be a synonym of 'summon')
(Other definitions for cites that I've seen before include "Quotes; names" , "Quotes as authority" , "Quotes (an author)" , "Refers to" , "Mentions as an example" .)