Gravitational mode calculation of basins discretized by orthogonal curvilinear grids, Beltrami, G.M., Bargagli A., and Briganti R. , Ocean Engineering, Volume 30, Number 7, p.833-853, (2003)

Stretching, alignment, and shear in slowly varying velocity fields, Haller, G., and Iacono Roberto , Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Volume 68, Number 5 2, p.563041-563046, (2003)

Local energy generation in barotropic flows, Iacono, Roberto , Journal of the Atmospheric Sciences, Volume 59, Number 13, p.2153-2163, (2002)