المؤلفون: Taubes, Clifford Henry, author

المصدر: Differential Geometry : Bundles, Connections, Metrics and Curvature, 2011.

الإتاحة: https://doi.org/10.1093/acprof:oso/9780199605880.003.0016Test

المؤلفون: Boyer, Charles P., author, Galicki, Krzysztof, author

المصدر: Sasakian Geometry, 2007, ill.

الإتاحة: https://doi.org/10.1093/acprof:oso/9780198564959.003.0010Test