http://pramiceiba.wixsite.com/library/page3
http://es.avionrevue.com/
https://aviaciontotal.cl/category/helicoptero/
https://www.faa.gov/regulations_policies/handbooks_manuals/aviation/instrument_procedures_handbook/
https://www.faa.gov/regulations_policies/handbooks_manuals/aircraft/amt_airframe_handbook/media/ama_Ch10.pdf
https://soaneemrana.org/onewebmedia/AIRFRAME%20STRESS%20ANALYSIS%20AND%20SIZING%20BY%20MICHAEL%20C.Y.%20NIU.pdf
https://actualidad.rt.com/actualidad/180566-aviones-militares-letales-eeuu