1. Jonas A, Shanker R, Liwag K, Sharpe M, Kovanis B, Silverberg E, et al.. eVTOL/urban air mobility TAM update: a slow take-off, but sky's the limit. Morgan Stanley. https://assets.verticalmag.com/wp-content/uploads/2021/05/Morgan-Stanley-URBAN_20210506_0000.pdf; 2021 [accessed 30.08.2021].
2. Datta A, Kallo J, Elbers S, Wakayama S, Alonso J, Botero E, et al.. Commercial intra-city on-demand electric-VTOL status of technology. NASA Aeronautics Research Institute, Technical Report TVF WG 2. January 2018.
3. Advancement in battery technology: a state-of-the-art review;Chen;IEEE industry applications society annual meeting, Portland,2016
4. Electric VTOL News. https://evtol.news/aircraft [accessed 30.08.2021].
5. Holden J, Goel N. Uber Elevate. Fast-forwarding to a future of on-demand urban air transportation, https://evtol.news/__media/PDFs/UberElevateWhitePaperOct2016.pdf; 2016 [accessed 30.08.2021].