cournot competition with strategic consumers I am not familiar with economics but does anybody know any reference about cournot competition with strategic consumers? 

In other words, is there any known competition where both producer and consumer can behave strategically and set the prices?
Studying a situation where consumers and producers interact to set price is precisely the study of bargaining. Any game theory text you pick up will almost certainly cover bargaining. The text I learned from, which I enjoyed thoroughly was Osborne's an introduction to Game Theory. 

A first example of a bargaining game would be Rubinstein's game of alternating offers

I don't think adding consumer strategic behaviour to Cournot directly would be particularly more enlightening than studying bargaining separately, since Cournot already abstracts from the price setting mechanism.