1. Prandtl, L., Induced Drag of Multiplanes, URL: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930080964.pdf.
2. Frediani, A., Gasperini, M., Saporito, G., and Rimondi, A., The Development of PrandtlPlane Aircraft Configuration, URL: https://pdfs.semanticscholar.org/6ec0/b11d9d309171fed9d174860a3fb30e3fbaa9.pdf.
3. Schiktanz, D., Conceptual Design of a Medium Range Box Wing Aircraft, URL: https://www.fzt.haw-hamburg.de/pers/Scholz/arbeiten/TextSchiktanzMaster.pdf.
4. Andrews, S.A., Multidisciplinary Analysis of Closed, Nonplanar Wing Configurations for Transport Aircraft, URL: https://www.researchgate.net/profile/Stephen_Andrews4/publication/338490441_Multidisciplinary_Analysis_of_Closed_Nonplanar_Wing_Configurations_for_Transport_Aircraft/links/5e417a97458515072d9184d7/Multidisciplinary-Analysis-of-Closed-Nonplanar-Wing-Configurations-for-Transport-Aircraft.pdf.
5. Frediani, A., The Prandtl Wing, URL: https://vdocuments.mx/the-prandtl-wing.html.