Mönkediek, Bastian. “Trait-Specific Testing of the Equal Environment Assumption: The Case of School Grades and Upper Secondary School Attendance”. Journal of Family Research 33, no. 1 (September 18, 2020): 115-147. Accessed June 16, 2021. https://ubp.uni-bamberg.de/jfr/index.php/jfr/article/view/381.