There is an article by Haden Boardman in Hi-Fi World. This was published in the September 1998 issue on page 67.

I wanted to make this post to have this referenced when you look for "Beogram 4000" in Google.

It took me ages to find it because this article is not indexed at all.

There is also an article in this month's issue (February 2011) on B&O cartridges.