@article{KierfeldIseHanischetal.2013, author = {Kierfeld, Frauke and Ise, Elena and Hanisch, Charlotte and G{\"o}rtz-Dorten, Anja and D{\"o}pfner, Manfred}, title = {Effectiveness of telephone-assisted parent-administered behavioural family intervention for preschool children with externalizing problem behaviour: a randomized controlled trial}, journal = {European child \& adolescent psychiatry}, volume = {22}, number = {9}, pages = {553 -- 565}, doi = {10.1007/s00787-013-0397-7}, year = {2013}, }