Não informado. (1989). IEEE Photonics Technology Letters. Institute of Electrical and Electronics Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. IEEE Photonics Technology Letters. New York: Institute of Electrical and Electronics Engineers, 1989.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. IEEE Photonics Technology Letters. Institute of Electrical and Electronics Engineers, 1989.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.