1. Drela, M., and Youngren, H., XFOIL 6.9 User Guide, http://web.mit.edu/drela/Public/web/xfoil/xfoil_doc.txt, 2001. [online; accessed 31. January 2017].
2. Drela, M., and Youngren, H., AVL 3.36 User Primer, http://web.mit.edu/drela/Public/web/avl/avl_doc.txt, 2017. [online; accessed 31. January 2019].
3. Fuel Cell Application for Small eVTOL UAVs