K. Maeda. (2022)cite arxiv:2210.00326Comment: 42 pages, 17 figures; Invited chapter for Handbook of X-ray and Gamma-ray Astrophysics (Eds. C. Bambi and A. Santangelo, Springer Singapore, expected in 2022). References updated.
R. Jäschke, B. Krause, A. Hotho, и G. Stumme. Proceedings of the Second International Conference on Weblogs and Social Media (ICWSM 2008), стр. 192--193. Menlo Park, CA, USA, AAAI Press, (2008)