Analysis of the Decay D^0 to K^0_S pi^0 pi^0 - Collaboration, CLEO; Lowrey, N; Mehrabyan, S; Selen, M; Wiss, J; Libby, J; Kornicer, M; Mitchell, R; Shepherd, MR; Tarbert, C; Besson, D; Pedlar, T; et al. (Physical Review D, 2011)