By Tom Pettit
By Joseph D. Bronzino (Trinity College, Hartford, Connecticut, USA)
By Watson, John
By Ian Graham
By Ade Deane-Pratt
By Smith, Peter, Begg, David
By Glover, David
By Mohammad Modarres (University of Maryland, College Park, USA)
By Lyesse Laloui
By Alan Allard
By Lyle Cummins