T. Sakata, R. Nishii, T. Chin, и R. Sawae. Frontiers in Handwriting Recognition, 2004. IWFHR-9 2004. Ninth International
Workshop on, стр. 377--381. IEEE Computer Society, (2004)
J. Guillera, и J. Sondow. (2005)cite arxiv:math/0506319Comment: 21 pages, to appear in The Ramanujan Journal. Added Corollary 3.3, Lemma 3.1, Equations (5) and (33), all or part of Examples 3.5, 3.6, 3.7, 3.9, 3.11, 3.14, 5.12, and references 1, 16, 17, 18. Omitted the old 4. Modified Equation (49), Theorem 5.3, and Examples 3.25 and 3.26. Expanded the Abstract and Introduction. Rearranged Sections 2 and 3.
S. Maxwell III. Proceedings of the 1994 IEEE World Congress on
Computational Intelligence, 1, стр. 413--417a. Orlando, Florida, USA, IEEE Press, (27-29 June 1994)