TY  - RPRT
TI  - Challenging behaviour: a challenge to change.
AU  - I A van Berckelaer-Onnes
AU  - J van Loon
AU  - A Peelen
PY  - 2002
DO  - 10.1177/1362361302006003004
UR  - https://pubmed.ncbi.nlm.nih.gov/12212917/
ID  - 12212917
ER  -