Origin of the SEEV Model of visual attention distribution
Wickens et al. (2003) is the earliest I'm aware of:

Wickens, C. D., Goh, J., Helleberg, J., Horrey, W. J., &amp; Talleur, D.
A. (2003). Attentional models of multitask pilot performance using
advanced display technology. Human Factors: The Journal of the Human
Factors and Ergonomics Society, 45(3), 360-380.

Actually, in that paper he cites Wickens et al. (2001), but I can't seem to find
a copy of this manuscript anywhere, and it has fewer citations:

Wickens, C. D., Helleberg, J., Goh, J., Xu, X., &amp; Horrey, W. J.
(2001). Pilot task management: Testing an attentional expected value
model of visual scanning. Savoy, University of Illinois Institute of
Aviation.

If you're using N-SEEV, cite one of these instead:

Steelman-Allen, K. S., McCarley, J. S., Wickens, C., Sebok, A., &amp;
Bzostek, J. (2009, October). N-SEEV: A computational model of
attention and noticing. In Proceedings of the Human Factors and
Ergonomics Society Annual Meeting (Vol. 53, No. 12, pp. 774-778). SAGE
Publications.
Wickens, C., McCarley, J., &amp; Steelman-Allen, K. (2009, October).
NT-SEEV: A model of attention capture and noticing on the flight deck.
In Proceedings of the Human Factors and Ergonomics Society Annual
Meeting (Vol. 53, No. 12, pp. 769-773). SAGE Publications.