Chemistry of Heterocyclic Compounds / KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII.
Латвийский институт органического синтеза Латвийской академии наук.
1996.
P. 222-226
17TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR SCIENCE AND NEW TECHNOLOGY, PTS 1 AND 2.
SPIE - INT SOC OPTICAL ENGINEERING.
Vol. 2778.
1996.
P. 19-20