SPECTRA OF LANTHANIDE AND TUNGSTEN OXYCHLORIDES DOPED WITH NEODYMIUM AND EUROPIUM Статья Venskovskii N.I., Zolin V.F., Markushev V.M., Ngassapa F.N.B., Tararov A.V., Tupoleva A.L. Journal of Applied Spectroscopy. Kluwer Academic Publishers-Plenum Publishers. Том 59. 1994. С. 537-542
PVA-BASED LIGHT FILTERS FOR UV AND VISIBLE SPECTRA Статья Zaitsev B.E., Dzhuraev R.R., Kotov A.V. Journal of Applied Spectroscopy. Kluwer Academic Publishers-Plenum Publishers. Том 59. 1994. С. 612-613