https://avesis.iku.edu.tr/yayin/043517a9-f991-4b82-bda8-8ae651d9f719/an-analysis-of-differential-bundle-functioning-in-multidimensional-tests-using-the-sibtest-procedure
An Analysis of Differential Bundle Functioning in Multidimensional Tests Using the SIBTEST...
an analysis
https://pure.psu.edu/en/publications/small-sample-dif-estimation-using-sibtest-cochrans-z-and-log-line/
Small-Sample DIF Estimation Using SIBTEST, Cochran's Z, and Log-Linear Smoothing - Penn State