Metcalf, R. Benton Cosmology, MPI for Astrophysics, Max Planck Society;
Metcalf, R. B. (2010). Neutrino masses, dark energy and the gravitational lensing of pre-galactic H i. Monthly Notices of the Royal Astronomical Society, 401(3), 1999-2004. doi:10.1111/j.1365-2966.2009.15795.x.