Neutron absorption constraints on the composition of 4 Vesta - Prettyman, Thomas; Mittlefehldt, David; Yamashita, Naoyuki; Beck, Andrew; Feldman, William; Hendricks, John; Lawrence, David; McCoy, Timothy; McSween, Harry; Paplowski, Patrick; Reedy, Robert C.; Toplis, Michael; et al. (Meteoritics and Planetary Science, 2013)