Sol-Gel Preparation and Spectral-Fluorescent Properties of Doped Erbium SBS Glasses for Optoelectronics / V. E. Gaishun [et al.] // Spectroscopy, Structure & Synthesis of Rare earth Systems : Abst. 4th Int. Spring Workshop, Landek Zdroj, 21-26 June, 2003 / Polish Academy of Sciences. Inst. Low. Temp. Struct. Research. – Wroclaw, 2003. – P. 42.