Our paper on targeted attacks is out in IEEE Security and Privacy Magazine.
"Targeted cyber attacks play an increasingly significant role in disrupting the online social and economic model, not to mention the threat they pose to nation-states. A variety of components and techniques come together to bring about such attacks"
Refer here: http://www.computer.org/csdl/mags/sp/2013/01/msp2013010054-abs.html
Enjoy !