E. Bakshy, I. Rosenn, C. Marlow, und L. Adamic. (2012)cite arxiv:1201.4145Comment: 10 pages, 7 figures. In the Proceedings of ACM WWW 2012, April 16-20, 2012, Lyon, France.
M. Kayed, und K. Shaalan. IEEE Transactions on Knowledge and Data Engineering, 18 (10):
1411--1428(2006)Member-Chia-Hui Chang and Member-Moheb Ramzy Girgis.