Thread:Project:Support desk/extract the link-tree of one topic

I want to analyse some (mathematical) topics. For this purpose, I want to extract the link-tree of the topic, to get an overview over the depending subjects. These linked subjects I want to display in a graph. So I get a clearly representation, what I have to understand yet. Tools like wget and webspider do not work. Wget does only load the top-page, may be it is excluded as a robot. Webspider gets too much. Is there any other way, to extract the link-tree of only one topic, that works with wikipedia? Friedrich from Hamburg