"Katsushi Ito,Hiroaki Nakajima,Shin Sasaki","Torsion and Supersymmetry in Omega-background",,"Journal of high Energy Physics",,"  11","  132",,2012,Nov.
"Katsushi Ito,Hiroaki Nakajima,Takuya Saka,Shin Sasaki","N=4 instanton calculus in Omega and R-R backgrounds",,"Nuclear Physics B",,"  860",,"  267-287",2012,July
"Katsushi Ito,Satoshi Kamoshita,Shin Sasaki","Deformed BPS Monopole in Omega-background",,"Physics Letters B",,"  710",,"  240-244",2012,Mar.
"Yasuyuki Hatsuda,Katsushi Ito,Yuji Satoh","T-functions and multi-gluon scattering amplitudes",,"Journal of High Energy Physics",,"  02","  002",,2012,Feb.