@article{Enders2007,
author = {Enders, C.K. and Tofighi, D.},
title= {Centering predictor variables in cross-sectional multilevel models: A new look at an old issue},
year = {2007},
doi = {10.1037/1082-989X.12.2.121},
journal = {Psychological Methods},
volume = {12},
number = {2},
pages = {121‒138},
}