@phdthesis{PhD-Thesis_2012_Zhu,
  address = {Cambridge, MA, USA},
  author = {Zhu, Lei},
  school = {Massachusetts Institute of Technology},
  title = {{Discrete Generalized Multigroup Theory and Applications}},
  url = {http://hdl.handle.net/1721.1/76503},
  year = {2012}
}