Nikolajevic, K. , Belanger, N. , Duvivier, D. , Atitallah, R. , Artiba, A. (2015). 'A Method to Compute Efficient 3D Helicopters Flight Trajectories Based on a Motion Polymorph-Primitives Algorithm'. World Academy of Science, Engineering and Technology, Open Science Index 104, International Journal of Mechanical and Materials Engineering, 9(8), 2019 - 2027.