@misc{480,
  author = {Zhikuan Chen and Jun Li and Beng Ong and Prashant Sonar and Kok Ong and Ging Ng and Siew Lim and Samarendra Singh and Yuning Li and others},
  title = {P-type materials and organic electronic devices},
  year = {2015},
  month = {oct # "~20"},
  note = {US Patent 9,166,167},
}