@unpublished{silvis-ecfd14-pres,
    author = {Silvis, M. H. and Verstappen, R. W. C. P. and Veldman, A. E. P.},
    date = {2014-07-22},
    title = "The higher-order gradient model for large-eddy simulation of turbulent flows",
    location = {\textit{6th European Conference on Computational Fluid Dynamics}, Barcelona, Spain, July 20--25, 2014},
}