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2. Allen, E. (2016). 12 rad recycling centers that go green in style. https://www.architecturaldigest.com/gallery/recycling-center-design
3. Assal, A. M., Atia, M. R. A., & Shaaban, S. (2018). Performance of solar dish Stirling engine systems under Egyptian operating conditions. Engineering Research Journal, 160(0), 79–104. https://doi.org/10.21608/erj.2018.139543
4. Egyptian General Survey Authority (EGSA). (2021). Bilbeis dwg map (SEKEM). https://www.esa.gov.eg/
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