Workflowy is the best outliner I could find, and fits in perfectly with the other note-taking …
Jaysen Naidoo
41
The feature you just described sounds awfully like Dynalist. See: http://help.dynalist.io/article/how-do-i-link-to-another-item-in-my-dynalist/
Disclaimer: I’m one of the two people who made Dynalist.