Psychiatric disorders, performance level at school and special education at early elementary school age - Kumpulainen, K.; Räsänen, E.; Henttonen, I.; Puura, K.; Moilanen, I.; Piha, J.; Tamminen, T.; Almqvist, F. (Springer, 1999)
http://dx.doi.org/10.1007/PL00010700
Keywords: WW-YZ