Periodic Very High Energy gamma-ray Emission from LS I +61 ¿?303 Observed with the MAGIC Telescope - Albert, J.; Aliu, E.; Anderhub, H.; Antonelli, L. A.; Antoranz, P.; Backes, M.; Baixeras, C.; Barrio, J. A.; Bartko, H.; Bastieri, D.; Becker, J. K.; Bednarek, W.; et al. (Astrophysical Journal, 2009)