@misc{434,
  author = {Beng Ong and Hualong Pan and Yuning Li and Yiliang Wu and Ping Liu},
  title = {Poly (dithienylbenzo [1, 2-b: 4, 5-b′] dithiophene) polymers},
  year = {2010},
  month = {oct # "~26"},
  note = {US Patent 7,820,782},
}