SPECTRA OF LANTHANIDE AND TUNGSTEN OXYCHLORIDES DOPED WITH NEODYMIUM AND EUROPIUM Article 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. Vol. 59. 1994. P. 537-542
PVA-BASED LIGHT FILTERS FOR UV AND VISIBLE SPECTRA Article Zaitsev B.E., Dzhuraev R.R., Kotov A.V. Journal of Applied Spectroscopy. Kluwer Academic Publishers-Plenum Publishers. Vol. 59. 1994. P. 612-613