MediaShift . How 'Follower Spam' Infiltrated Twitter -- and How to Stop It | PBS#twitter#spam#prevention#follower·pbs.org·Nov 10, 2008MediaShift . How 'Follower Spam' Infiltrated Twitter -- and How to Stop It | PBS
Overlapr - Twitter User Comparisons#twitter#follower#comparison#statistics·overlapr.com·Jun 23, 2011Overlapr - Twitter User Comparisons
ManageFlitter - Twitter Account Management#twitter#manager#bulk#follower·manageflitter.com·Sep 17, 2011ManageFlitter - Twitter Account Management