DISCOVERY OF THREE z > 6.5 QUASARS IN THE VISTA KILO-DEGREE INFRARED GALAXY (VIKING) SURVEYBased on observations collected at the European Southern Observatory, Chile, programs 179.A-2004, 087.A-0717, 087.A-0890 and 088.A-0897. This paper also includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. - Venemans, B. P.; Findlay, J. R.; Sutherland, W. J.; Rosa, G. De; McMahon, R. G.; Simcoe, R.; González-Solares, E. A.; Kuijken, K.; Lewis, J. R. (Astrophysical Journal, 2013)