T. Haist, M. Schönleber, und H. Tiziani. Applied optics, (1998)3 cites: https://scholar.google.com/scholar?cites=13523355979693248351&as_sdt=2005&sciodt=0,5&hl=en.
L. Hänel, Y. Elogail, D. Schwarz, I. Fischer, und J. Schulze. 2018 41st International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), Seite 0027-0031. (Mai 2018)