[Air-L] Persuasive Technology Texts

Hi all I'm new to this just starting a research masters in psychology, looking into the area of persuasive technology particularly persuasion through mobile phones. I'm wondering if anyone could suggest some readings for me. I've read B.J. Foggs Persuasive* *Technology: Using Computers to Change What We Think and Do and Mobile Persuasion. I've also looked at the papers from the three International Conferences on Persuasive Technology. If people could give me some suggestions I would greatly appreciated it. Thanks Michelle