Wolfram Web Resource. Wolfram Research, Inc. (英语). Ciocan-Fontanine, Ionuţ. Quantum cohomology of flag varieties. arXiv preprint alg-geom/9505002. 1995.
doi:10.1007/BF01232233. Gromov, M. Filling Riemannian manifolds. J. Diff. Geom. 1983, 18 (1): 1–147. MR 0697984. Hebda, J. Some lower bounds for the area