5Hendriksen IJ, Holewijn M. Degenerative changes of the spine of fighter pilots of the RNIAFR performer. National Aeromedieal inst. Soesterberg ( Netherlands ). 1998,12 ( 4 ) : 32-36
9Andersen H. Harld T. Rodiological investigation of the vertebral column of candidates for military flying training the Royal Norwegian Air force. ACARD,Neck Injury in Advanced Military Aircraft Environments, 1990,6PN90-25459 19-52
10Alricson M.Hrms Ringdahl K,Schuldt K.et al ,Mobility,musclc strength,ecdurance the cervical spine in Swedish Air Force pilots. Aviat Space Enviro Med. 2001,72 (4) 336-342