The cluster problem revisited. - Achim Wechsung; Spencer D. Schaber; Paul I. Barton (J. Glob. Optim., 2014)

Convergence-order analysis for differential-inequalities-based bounds and relaxations of the solutions of ODEs. - Spencer D. Schaber; Joseph K. Scott; Paul I. Barton (J. Glob. Optim., 2019)