TY - RPRT TI - Unit quaternion description of spatial rotation in 3D electron cryo-microscopy AU - Hu, M. AU - Zhang, Q. AU - Yang, J. AU - Li, X. PY - 2019 DO - 10.1101/733881 UR - https://www.biorxiv.org/content/10.1101/733881v1 ID - 10.1101/733881 ER -