I assume you first checked the web site mentioned in the previous message http://ourworld.compuserve.com/homepages/hstein/ .
You can also look at the following references:
The Individual Psychology of Alfred Adler, edited by Heinz and Rowena Ansbacher.
Lydia Sicher: An Adlerian Perspective, edited by Adele Davidson.
Born to Rebel..., by Frank Sulloway (not strictly Adlerian, but quite interesting, especially from a historical perspective)
Good luck with your paper.