Zavadil, J., Ležal, D., Procházková, O. Optical characterization of glass materials doped with rare-earth elements. Bellingham: SPIE The International Society for Optical Engineering, 2000. ISBN 0-8194-3641-0. ISSN 0277-786X. In: HRABOVSKÝ, M., TOMÁNEK, P., MILER, M., eds. Photonics, Devices, and Systems. , s. 478-483.