Gabai, David (2009), "Hyperbolic geometry and 3-manifold topology", in Mrowka, Tomasz S.; Ozsváth, Peter S. (eds.), Low dimensional topology, IAS/Park City Math. Ser., vol. 15, Providence, R.I.: Amer. Math. Soc., pp. 73–103, ISBN978-0-8218-4766-4, MR2503493