Introductory Articles:

HANDY, T.C. (2005).  "Event-Related Potentials.  A Methods Handbook".  Cambridge, MA: The MIT Press   

LUCK, S.J.  (2005).  "An Introduction to the Event-Related Potential Technique".  Cambridge, MA: The MIT Press     

SCANLON, P., COMMINS, S. & ROCHE, R.  (2006).  "High Density Event-Related Potentials: Current Theories and Practice".  The Irish Psychologist 33 (1): 5-8 

ERPs and Decision Making: 

COHEN, M.X., ELGER, C.E., RANGANATH, C.  (2007).  "Reward expectation modulates feedback-related negativity and EEG spectra".  Neuroimage 35(2): 968-978

GEHRING, W.J., WILLOUGHBY, A.R.  (2002).  "The medial frontal cortex and the rapid processing of monetary gains and losses".  Science 295(5563): 2279-2282

HELDMANN, M., RÜSSELER, J. & MÜNTE, T.F.  (2005).  "Event-Related Potentials in a Decision-Making Task with Delayed and Immediate Reward Conditions".  Journal of Psychophysiology 19(4): 270-274

HEWIG, J., TRIPPE, R., HECHT, H., COLES, M.G.H., HOLROYD, C.B., MILTNER, W.H.R.  (2007).  "Decision-making in blackjack: an electrophysiological analysis".  Cerebral Cortex 17(4): 865-877

MASAKI, H., TAKEUCHI, S., GEHRING, W., TAKASAWA, N., YAMAZAKI, K.  (2006).  "Affective-motivational influences on feedback-related ERPs in a gambling task".  Brain Research 1105: 110-121

YEUNG, N., SANFEY, A.G.  (2004).  "Independent coding of reward magnitude and valence in the human brain".  The Journal of Neuroscience 24(28): 6258-6264