Adam G. Riess (JHU, STScI), Lucas Macri (Texas A&M), Weidong Li (UCB), Hubert Lampeitl (UPort), Stefano Casertano (STScI), Henry C. Ferguson (STScI), Alexei V. Filippenko (UCB), Saurabh W. Jha (Rutgers), Ryan Chornock (UCB), Lincoln Greenhill (SAO), Max Mutchler (STScI), Mohan Ganeshalingham (UCB).Cepheid Calibrations of Modern Type Ia Supernovae:Implications for the Hubble Constant(англ.).Arxiv.org(5 мая 2009).Праверана 2чэрвеня 2009.