Holmes, C., & Oakleaf, M. (2013). The official (and unofficial) rules for norming rubrics successfully. Journal of Academic Librarianship, 39(6), 599–602. https://www.researchgate.net/publication/259096351_The_Official_and_Unofficial_Rules_for_Norming_Rubrics_Successfully
Abstract: Authors give advice on how to conduct norming (calibration) training for rubric scoring; specifically, having librarians participate in the process and reconciling divergences.