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References
- ↑ Sullivan, Dennis (1975). "Differential forms and the topology of manifolds". Manifolds—Tokyo 1973 (Proc. Internat. Conf., Tokyo, 1973). Tokyo: University of Tokyo Press. pp. 37–49. MR 0370611. Zbl 0319.58005.
- ↑ Kotschick, Dieter (2001). "On products of harmonic forms". Duke Mathematical Journal . 107 (3): 521–531. arXiv: math/0004009 . doi:10.1215/S0012-7094-01-10734-5. MR 1828300.
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