Publishing firm Centaur said it had traded strongly in the four months to the end of October and was on track to meet expectations.Underlying revenues across the Group were 9% ahead of the same period last year, the firm said.Underlying print, digital and events revenues were up 2%, 15% and 23% respectively. Forward bookings in its exhibitions divison were ahead by 17% year-on-year.Analysts at Altium Securities said they were encouraged by this morning's update and, although mindful of the group's 50% advertising exposure, believe its stock offers attractive value given the substantial growth prospects encompassed in its forecasts.Altium maintains its Buy recommendation.