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[1]
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O. Calin and V. Mangione, “Geodesics with Constraints on Heisenberg Manifolds,” Results in Mathematics, 2003, pp. 44-53.
http://people.emich.edu/ocalin/Papers_research/4.pdf
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[2]
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M. Bonnefont, “Functional Inequality for Heat Kernels Sub-Elliptical,” Ph.D. Thesis, Paul Sabatier University, Toulouse, 2009.
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[3]
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D.-C. Chang, I. Markina and A. Vasil’ev, “Sub-Riemannian Geodesics on the 3-D Sphere,”2008.
http://arxiv.org/pdf/0804.1695.pdf
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[4]
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L. Capogna, D. Danielli, S. Pauls and J. Tyson, “An Introduction to the Heisenberg Group and the Sub-Rie-mannian Isoperimetric Problem,” Die Deutsche Bibliothek, Deutsche Nationalbibliografie, 2007.
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[5]
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R. Beals, B. Gaveau and P. C. Greiner, “Hamilton-Jacobi Theory and the Heat Kernel on Heisenberg Groups,” journal of mathéMatiques Pures et Appliquées, Vol. 79, No. 7, 2000, pp. 633-689.
doi:10.1016/S0021-7824(00)00169-0
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[6]
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O. Calin, “The Missing Direction and Differential Geometry on Heisenberg Manifolds,” Ph.D. Thesis, Toronto University, Toronto, 2000.
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