@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039984,
 author = {Sun, Zongliang},
 issue = {2},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Dec},
 pages = {221--234},
 title = {On Quadratic Differential Metrics on a Closed Riemann Surface},
 volume = {21},
 year = {2014}
}