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Hi,
that journal has many issues posted online in djvu format, but unfortunately the newest ones are only from 1994:

http://ashipunov.info/journals/bmsn/index.html

According to the numbering, the volume of 1991 should be 66, not 96 as you indicated. We have that issue in one of the libraries here in Vilnius, so if you won't manage to get it from anywhere else, I could make a copy some day :)