@unpublished{silvis-burgers15b-pres,
    author = {Silvis, M. and Verstappen, R. and Veldman, A.},
    date = {2015-06-12},
    title = "Going beyond eddy viscosity: Finding a general representation of subgrid-scale stresses in large-eddy simulation",
    location = {\textit{Turbulence Contact Day}, J. M. Burgerscentrum, Delft, The Netherlands, June 12, 2015},
}