At 18.24 +0100 2003-10-29, Hans Aberg wrote:
>In the past, it was mentioned literature describing (traditional)
>typesetting rules of mathematics. But unfortunately, I did not copy those
>references, and from time to time, I encounter people who want to know.
>Could somebody be kind and indicate some references to such literature to me?

The book which you are most likely to find in Sweden is

  W. N. Lansburgh:
  Almqvist & Wiksells sättningsregler (Swedish),
  Almqvist & Wiksell, Uppsala, 1964.

There are viii+457 pages, at least 160 of which are directly concerned with
mathematical typography.

Lars Hellström