"Who can recommend good books/articles on negotiation?"
The best book on negotiation, bar none, is "Bargaining for Advantage : Negotiation Strategies for Reasonable People" By Richard Shell.
http://www.amazon.com/Bargaining-Advantage-Negotiation-Strat...
(looks like it is out of print, but used copies seem cheap enough)
The best book on negotiation is Bargaining for Advantage by G. Richard Shell from Wharton. I would reading Getting to Yes first to get the basics though.
The best book on negotiation, bar none, is "Bargaining for Advantage : Negotiation Strategies for Reasonable People" By Richard Shell. http://www.amazon.com/Bargaining-Advantage-Negotiation-Strat... (looks like it is out of print, but used copies seem cheap enough)