Algebraic and geometric methods in nonlinear control theory: Editors M. Fliess and M. Hazewinkel. - David J. Bell (Autom., 1988)

Searcher's Assessments of Task Complexity for Web Searching. - David J. Bell; Ian Ruthven (ECIR, 2004)

Junction point on partially singular trajectories. - Ameze Odia; David J. Bell (Int. J. Control, 2012)