The formal reference of DIVA 2.0 is:
JJS Kooij. Adult ADHD. Diagnostic assessment and treatment, 3rd ed. Springer, 2012
This book can be ordered at: http://www.springer.com/medicine/psychiatry/book/978-1-4471-4137-2
The first study in which DIVA 2.0 was used, is an epidemiological study on ADHD in older adults in the Dutch population.
For Validations click this link.
For articles on DIVA please check Pubmed.