@misc{indiciae4043d838e0a3, title = {A nonlinear mixed model framework for item response theory.}, author = {Frank Rijmen and Francis Tuerlinckx and Paul De Boeck and Peter Kuppens}, year = {2003}, doi = {10.1037/1082-989x.8.2.185}, url = {https://pubmed.ncbi.nlm.nih.gov/12924814/}, note = {Source identifier: 12924814} }