Bulacu, Daniel; Caenepeel, Stefaan; Panaite, Florin; Oystaeyen, F. Van <br/><br/>
Quasi-Hopf Algebras: A Categorical Approach 
Daniel; Caenepeel, Stefaan; Panaite, Florin; Oystaeyen, F. Van Bulacu 
 - Cambridge  Cambridge  2019