1. “U-Space Concept of Operations: A Key Enabler for Opening Airspace to Emerging Low-Altitude Operations”
by Cristina Barrado et al.
Aerospace 2020, 7(3), 24; https://doi.org/10.3390/aerospace7030024
Available online: https://www.mdpi.com/2226-4310/7/3/24

2. “A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft”
by Smruti Sahoo et al.
Aerospace 2020, 7(4), 44; https://doi.org/10.3390/aerospace7040044
Available online: https://www.mdpi.com/2226-4310/7/4/44

3. “Large Constellations of Small Satellites: A Survey of Near Future Challenges and Missions”
by Giacomo Curzi et al.
Aerospace 2020, 7(9), 133; https://doi.org/10.3390/aerospace7090133   
Available online: https://www.mdpi.com/2226-4310/7/9/133

4. “Selective Laser Melting of Aluminum and Titanium Matrix Composites: Recent Progress and Potential Applications in the Aerospace Industry”
by Eskandar Fereiduni et al.
Aerospace 2020, 7(6), 77; https://doi.org/10.3390/aerospace7060077  
Available online: https://www.mdpi.com/2226-4310/7/6/77

5. “Future Directions for Electric Propulsion Research”
by Ethan Dale et al.
Aerospace 2020, 7(9), 120; https://doi.org/10.3390/aerospace7090120   
Available online: https://www.mdpi.com/2226-4310/7/9/120

6. “Electric Propulsion Methods for Small Satellites: A Review”
by Dillon O’Reilly et al.
Aerospace 2021, 8(1), 22; https://doi.org/10.3390/aerospace8010022
Available online: https://www.mdpi.com/2226-4310/8/1/22 

7. “Proof of Concept Study for Fuselage Boundary Layer Ingesting Propulsion”
by Arne Seitz et al.
Aerospace 2021, 8(1), 16; https://doi.org/10.3390/aerospace8010016
Available online: https://www.mdpi.com/2226-4310/8/1/16

8. “Automated Defect Detection and Decision-Support in Gas Turbine Blade Inspection”
by Jonas Aust et al.
Aerospace 2021, 8(2), 30; https://doi.org/10.3390/aerospace8020030
Available online: https://www.mdpi.com/2226-4310/8/2/30

9. “Review of State-of-the-Art Green Monopropellants: For Propulsion Systems Analysts and Designers”
by Ahmed E. S. Nosseir et al.
Aerospace 2021, 8(1), 20; https://doi.org/10.3390/aerospace8010020  
Available online: https://www.mdpi.com/2226-4310/8/1/20

10. “Performance and Emissions of a Microturbine and Turbofan Powered by Alternative Fuels”
by Radoslaw Przysowa et al.
Aerospace 2021, 8(2), 25; https://doi.org/10.3390/aerospace8020025  
Available online: https://www.mdpi.com/2226-4310/8/2/25