The Micro-Arcsecond scintillation-induced variability (MASIV) survey. ii the first Four Epochs - Lovell, J.; rickett, B.; Macquart, Jean-Pierre; Jauncey, J.; Bignall, Hayley; Kedziora-Chudczer, L.; Ojha, R.; Pursimo, T.; Dutka, M.; Senkbeil, C.; Shabala, S. (The American Astronomical Society, 2008)