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References
- ↑ Pajitnov, Andrei V. (2006), Circle-valued Morse theory, de Gruyter Studies in Mathematics, 32, Walter de Gruyter & Co., Berlin, doi:10.1515/9783110197976, ISBN 978-3-11-015807-6, MR 2319639 .
- ↑ Farber, Michael (2004), Topology of closed one-forms, Mathematical Surveys and Monographs, 108, American Mathematical Society, Providence, RI, p. 50, doi: 10.1090/surv/108 , ISBN 0-8218-3531-9, MR 2034601 .
- ↑ Hutchings, Michael; Lee, Yi-Jen (1999), "Circle-valued Morse theory, Reidemeister torsion, and Seiberg-Witten invariants of 3-manifolds", Topology , 38 (4): 861–888, arXiv: dg-ga/9612004 , doi:10.1016/S0040-9383(98)00044-5, MR 1679802 .
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