@book{oettershagen2016perpetual,
  title={Perpetual Flight with a Small Solar-powered UAV: Flight Results, Performance Analysis and Model Validation},
  author={Oettershagen, P. and Melzer, A. and Mantel, T. and Rudin, K. and Stastny, T. and Hinzmann, T. and Alexis, K. and Siegwart, R.},
  url={https://books.google.co.kr/books?id=kULljwEACAAJ},
  year={2016}
}