Efficient derivative-free optimization. - Paul Belitz; Thomas Bewley (CDC, 2007)

Applications on multi-dimensional sphere packings: derivative-free optimization - Paul Belitz (2011)

New horizons in sphere-packing theory, part II: lattice-based derivative-free optimization via global surrogates. - Paul Belitz; Thomas Bewley (J. Glob. Optim., 2013)