The properties of cataclysmic variables in photometric Hα surveys. - Witham, A. R.; Knigge, C.; Gänsicke, B. T.; Aungwerojwit, A.; Corradi, R. L. M.; Drew, J. E.; Greimel, R.; Groot, P. J.; Morales-Rueda, L.; Rodriguez-Flores, E. R.; Rodriguez-Gil, P.; Steeghs, D. (Monthly Notices of the Royal Astronomical Society, 2006)