“…In BL Hyi, narrow minima appear around phase zero, which, however, are not separated by one orbital period and thus have no geometric origin (Tuohy et al, 1985). In VV Pup in low state, no significant hump in the light curve could be seen during observations of one night, whereas it was clearly present on the following night (Bailey, 1978). Similar behavior has been reported for other AM Herculis stars (e.g., Szkody et al, 1983).…”