Authors: Koskelainen, M Sourander, A Kaljonen, A

Citation: M. Koskelainen et al., The strengths and difficulties questionnaire among Finnish school-aged children and adolescents, EUR CHILD A, 9(4), 2000, pp. 277-284

Authors: Sourander, A Koskelainen, M Helenius, H

Citation: A. Sourander et al., Mood, latitude, and seasonality among adolescents, J AM A CHIL, 38(10), 1999, pp. 1271-1276