Epstein...: Modelling the role of vertical diffusivity in the flow-induced aggregation of zooplankton at a front. Epstein, A. W., and R. C. Beardsley, 1996.
Epstein...: Mechanisms of flow-induced aggregation and concentration of zooplankton at fronts (invited talk). Epstein, A. W., R. C. Beardsley, and M. C. Macaulay, 1993.