See also - sustany/dvg GitHub Wiki

In formal legal writing,�a signal indicating that the cited source provides additional support for the statement after primary supporting sources have already been cited.� Thus,�see also citations most appropriately follow sources that have been cited with the see signal or no signal at all.

In general writing, see also may be used not as a signal for supporting sources, but as a way to suggest other ideas that may be of interest to the reader because of their similarity to the discussion at hand.