TY - BOOK ID - 137747890 TI - Multidimensional item response model with internal restrictions on item difficulty AU - Butter, René.. AU - De Boeck, Paul PY - 1994 PB - Leuven KUL. Department of psychology. Research group on quantitative methods DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:137747890 AB - ER -