Amit Singer Zhizhen Zhao 0001 Yoel Shkolnisky Ronny Hadani Viewing Angle Classification of Cryo-Electron Microscopy Images Using Eigenvectors. 723-759 2011 4 SIAM J. Imaging Sci. 2 https://doi.org/10.1137/090778390 https://www.wikidata.org/entity/Q28730626 db/journals/siamis/siamis4.html#SingerZSH11