Thu, 24 Jul 2008 23:21:37 BST CiteULike: dchens Barabasi http://www.citeulike.org/user/dchen/author/Barabasi CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2730236 <i>Nature, Vol. 387, No. 6635. (19 June 1997), pp. 765-765.</i> What keeps sandcastles standing? DJ Hornbaker R Albert I Albert AL Barabasi P Schiffer Nature, Vol. 387, No. 6635. (19 June 1997), pp. 765-765. 2008-04-28T15:12:29-00:00 1997 Nature 387 6635 765 765 grains nature