Internal links to articles (ID=xxx):
index.php?option=com_content&view=article&id=xxx
Internal links to menu items (ID=xxx) for “Menu Item Type” = Article:
index.php?option=com_content&view=article&Itemid=xxx
Internal links to menu items (ID=xxx) for “Menu Item Type” = Wrapper:
index.php?option=com_wrapper&view=wrapper&Itemid=xxx
External links to articles (ID=xxx):
http://matcalc.tuwien.ac.at/index.php?option=com_content&view=article&id=xxx
External links to menu items (ID=xxx):
http://matcalc.tuwien.ac.at/index.php?Itemid=xxx
External link to dokuwiki page (page=xx:xx…):
http://matcalc.tuwien.ac.at/index.php/Documentation/doku.php?id=xx:xx