The Geometry and Topology of Three-Manifolds by William Thurston
= The Geometry and Topology of Three-Manifolds by William Thurston
{c}
{tag=Work by William Thurston}
{title2=1980; electronic version 1.1, March 2002}
Primary text: https://people.math.osu.edu/davis.12/courses/8800/Thurston13.pdf
Chapter 13, Definition 13.2.3 and teardrop example, p. 304; Definition 13.2.5, p. 307.