Psychometric properties of online administered parental strengths and difficulties questionnaire (SDQ), and normative data based on combined online and paper-and-pencil administration
Child and Adolescent Psychiatry and Mental Health (2013) - Comment
pubmed: 24325882  doi: 10.1186/1753-2000-7-40  issn: 1753-2000 

Annika Björnsdotter, Pia Enebrink, Ata Ghaderi