Hyperion's sponge-like appearance.
Thomas PC, Armstrong JW, Asmar SW, Burns JA, Denk T, Giese B, Helfenstein P, Iess L, Johnson TV, McEwen A, Nicolaisen L, Porco C, Rappaport N, Richardson J, Somenzi L, Tortora P, Turtle EP, Veverka J.
Thomas PC, et al. Among authors: armstrong jw.
Nature. 2007 Jul 5;448(7149):50-3. doi: 10.1038/nature05779.
Nature. 2007.
PMID: 17611535