Stepien, Ryszard, Ryszard Buczynski, Dariusz Pysz, Ireneusz Kujawa, and Monika Mirkowska. 2010. “Tellurite Glasses for Microstructured Optical Fibers Manufacturing”. Photonics Letters of Poland 2 (1):pp. 16-18. https://doi.org/10.4302/photon. lett. pl.v2i1.102.