Application of solvent-free crystallization technology in the production of vitamin B12 
CHENG Jun-shan, LI He, YANG Ji-zong, PAN Li-hong, GU Xiao-fei, ZHANG Miao-jing
Shandong Science . 2021, (2): 96 -103 .  DOI: 10.3976/j.issn.1002-4026.2021.02.013