Many journal articles have been published about ITP. Most are written for medical professionals. If you can get past the vocabulary, they often contain helpful information. You can search medical journals and get copies at the National Medical Library and PubMed of the National Institutes of Health, your hematologist, or local medical library. You can enter a selection profile on the Medfetch site and new journal articles will be sent to your e-mail address.
Because there are so many articles, The New England Journal of Medicine provides collections. Here's their collection on thrombocytopenia.
See the Treatment Guidelines page for links to comprehensive treatment articles specific to ITP.