CrossLexica:
A Universe of Links between Russian Words
You can use an abridged version of CrossLexica dictionary online
A PPT presentation on CrossLexica in English / A PPT presentation on CrossLexica in Russian
A letter of recommendation of CrossLexica by Prof. Juri D. Apresjan, Dr. Leonid L. Iomdin, Dr. Leonid L. Cinman
A letter of evaluation of CrossLexica
by Prof. Igor Mel'cuk