@article{NCF+04, 
	Author = {Nagai, Y. and Critchley, H. D. and Featherstone, E. and Fenwick, P. B. and Trimble, M. R. and Dolan, R. J.},
	Title = {Brain activity relating to the contingent negative variation: an f{MRI} investigation},
	Journal = {Neuroimage},
	Volume = {21},
	Number = {4},
	Pages = {1232--41},
	Year = {2004}
}