1. Born, M. and Wolf, E. Principles of Optics, par. 4.2., Pergamon Press N.Y. (1959).
2. Toraldo di Francia, G. A Family of Perfect Configuration Lenses of Revolution, Optica Acta vol. 1 n. 4 (February 1955) 157–163.
3. Morgan, S.P. J. Appl.Phys. vol. 25, (1958) 1358, General Solution of the Luneberg Lens Problem.
4. Southwell, W.H. Inhomogeneous Optical Waveguide Lens Analysis, JOSA vol. 67, (August 1977), 8, 1004.
5. Yao, S.K., Anderson, D.B., August, R.R., Youmous, B.R., and Oania, C.M. Guided-Wave Optical Thin-Film Luneburg Lenses: Fabrication Technique and Properties, Appl.Opt. vol.18, 24 (15 December 1979 ) 4067.