Interactive e-book by MG Ormerod, serving as an excellent introduction into the theoretical and practical details of flow cytometry.
Beckman-Coulter offers the pdf version of this all-encompassing standard volume by Howard Shapiro as a free download (75 MB). Applicable as an index (via the pdf search) as well as a compendium adressing all questions regarding flow cytometry.
Informative website on all aspects of cytometry - with the extensive archive of the "Purdue List".
No question that has not already been asked in this forum...
A consensus paper by leading immunologists and cytometry experts covering all important aspects of planning, performing and analysing flow cytometric experiments.