R. Fintushel, and R. Stern. (1998)cite arxiv:math/9811019Comment: 9 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTMon2/paper5.abs.html.
P. Frampton. (2006)cite arxiv:astro-ph/0612243Comment: 7 pages latex. Talk presented at Workshop on Origin of Mass and Strong Coupling Gauge Theories. Nagoya, Japan. 21-24 November,2006.
M. Freedman. (2000)cite arxiv:math/0002124Comment: 11 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTMon2/paper6.abs.html.
J. Guillera, and 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.