"Hisaaki Endo,Dieter Kotschick","Failure of separation by quasi-homomorphims in mapping class groups",,"Proceedings of the American Mathematical Society",,"Vol. 135","No. 9","pp. 2747-2750",2007,Sept.
"Hisaaki Endo,Mustafa Korkmaz,Dieter Kotschick,Burak Ozbagci,Andras Stipsicz","Commutators, Lefschetz fibrations and signatures of surface bundles",,"Topology",,"Vol. 41","No. 5","pp. 961-977",2002,Sept.
"Hisaaki Endo,Dieter Kotschick","Bounded cohomology and non-uniform perfection of mapping class groups",,"Inventiones mathematicae",,"Vol. 144","No. 1","pp. 169-175",2001,Apr.