López, Harm Frederik Althuisius.«Helicopter physics».ColoradoCollege.edu. Colorado College Dept. of Physics. Arxivat de l'original el 26 d'agost 2021.[Consulta: 28 gener 2022].
"The cause of the aerodynamic lifting force is the downward acceleration of air by the airfoil..." Weltner, Klaus.«Physics of Flight – reviewed».Goethe University Frankfurt. Arxivat de l'original el 2011-07-19.
"The cause of the aerodynamic lifting force is the downward acceleration of air by the airfoil..." Weltner, Klaus.«Physics of Flight – reviewed».Goethe University Frankfurt. Arxivat de l'original el 2011-07-19.
López, Harm Frederik Althuisius.«Helicopter physics».ColoradoCollege.edu. Colorado College Dept. of Physics. Arxivat de l'original el 26 d'agost 2021.[Consulta: 28 gener 2022].