@misc{indiciae41528265b1bd,
  title = {Piezoelectric and Semiconducting Coupled Nanogenerators},
  author = {Wang, Zhong L. and Song, Jinhui and Wang, Xudong},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20130000548},
  note = {Source identifier: 20130000548}
}