1. Bagaglini, L., Fernández, M., Fino, A.: Laplacian coflow on the 7-dimensional Heisenberg group. arXiv:1704.00295v1 [math.DG]
2. Bryant, R.L.: Metrics with exceptional holonomy. Ann. Math. 126, 525–576 (1987)
3. Bryant, R.L.: Some remarks on $$G_2$$ structrures. In: Proceedings of Gökova Geometry-Topology Conference 2005, Gökova Geometry/Topology Conference (GGT), Gökova, pp. 75–109 (2006)
4. Bryant, R.L., Xu, F.: Laplacian flow for closed $$G_2$$-structures: short time behavior. arXiv:1101.2004 [math.DG]
5. Chiossi, S.G., Fino, A.: Conformally parallel $$G_2$$ structures on a class of solvmanifolds. Math. Z. 252, 825–848 (2006)