Hentschel, R. Advanced Optics Using Aspherical Elements. SPIE Digital Library.
Cita Chicago (17th ed.)Hentschel, Rüdiger. Advanced Optics Using Aspherical Elements. SPIE Digital Library.
Cita MLA (9th ed.)Hentschel, Rüdiger. Advanced Optics Using Aspherical Elements. SPIE Digital Library.
Atenció: Aquestes cites poden no estar 100% correctes.