Retiring/Schizoid Personality - Theodore Millon's brief description of schizoid personality disorder together with a diagram. - http://www.millon.net/Taxonomy/schizoid.htm
Wikipedia - Schizoid Personality Disorder - Gives the diagnostic criteria for SPD and differentiates SPD from similar disorders - http://en.wikipedia.org/wiki/Schizoid_personality_disorder
Polymorphism in Dopamine and Cluster A PDs - Abstract of the article "The Relationship between Polymorphism in Exon 6 of the Dopamine D2 Receptor Gene (DRD2) and Cluster A Personality Disorders in Men." - http://www.nature.com/cgi-taf/DynaPage.taf?file=/jhh/journal/v15/n8/abs/1001231a.html
Schizoid Personality Disorder - Online Diagnosis - Online diagnosis of schizoid personality disorder based on the patient's symptoms. Requires paid subscription. - http://www.medical-library.org/journals/mddx/schizoid_dis/1_schizoid_personality.htm
Treatment of Schizoid Personality Disorder - Disscusses psychotherapy, group therapy, medications and self-help. - http://mentalhelp.net/poc/view_doc.php?type=doc&id=482&cn=8&PHPSESSID=b810dea62879411b193d759fb315ceb6
Psych Central: Schizoid Personality Disorder Treatment - General treatment guidelines for schizoid personality disorder, including psychotherapy, medications and self-help resources. - http://www.grohol.com/disorders/sx30t.htm
Schizoid Personality Disorder - Deals with diagnostic criteria, treatment, description, differential diagnosis and the author's personal observations regarding SPD. - http://www.pipeline.com/~dada3zen/schizoid_per_dis.htm
Cluster A: Schizoid Personality Disorder - Contains a table summarizing mental health, treatment and addiction issues. - http://www.toad.net/~arcturus/dd/spdtable.htm
Oppressed Group: Schizoid A Personality Not a Disorder - Expresses the author's view that the schizoid personality is not a disorder but rather a style and that mental health professionals use the term "disorder" as an oppression tool. - http://www.pipeline.com/~dada3zen/schizoid_a_personality_not_a_disorder.htm
Yahoo! Groups: Schizoid - Discussion group for people with schizoid personality disorder or similar disorders. Includes links, files, chat and polls sections. - http://groups.yahoo.com/group/schizoid/
The Difference Between Personality Disorders - The differences between the schizoid personality disorder and other personality disorders highlighted. - http://www.pipeline.com/~dada3zen/personality.htm