Hello, Tatiana Chichinina and I.R. Obolentseva,
I am what is called a ' senior' geophysicist.
I worked in Soviet Union with Leonid Brodov in 1980 about 3C seismic, shear waves ... and azimuthal anisotropy.
Even met with Gal'perin once.
I have hust discovered your article:
" Fifty years of seismic anisotropy studies in Russia
I would enjoy chatting with you and I.R. Obolentseva on this subject.
Best regards