"Katsushi Ito,Yusuke Kanayama,Hiroaki Nakajima,Shin Sasaki","BPS Equations in Omega-deformed N = 4 Super Yang-Mills Theory",,"Journal of High Energy Physics",,"  1511","  152","  1-24",2015,Nov.
"Katsushi ITO,Hiroaki Nakajima,Shin Sasaki","Twisted N=4 Super Yang-Mills Theory in Omega-background",,"Journal of high Energy Physics",,"  10","  080","  1-23",2013,Oct.
"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,Hiroaki Nakajima,Takuya Saka,Shin Sasaki","N=2 instanton effective action in Omega-background and D3/D(-1)-brane system in R-R background",,"Journal of High Energy Physics",,"  11",,"  093",2010,Oct.
"Katsushi ITO,Hiroaki Nakajima,Takuya Saka,Shin Sasaki","Instanton calculus in deformed N=4 super Yang-Mills theories",,"Journal of High Energy Physics",,"  10",,"  028",2009,Oct.
"Katsushi Ito,Hiroaki Nakajima,Shin Sasaki","Instanton Calculus in R-R 3-form background and Deformed N = 2 Super Yang-Mills Theory",,"Journal of High Energy Physics",,"  11",,"  113",2008,Dec.
"Katsushi ITO,Hiroaki Nakajima,Shin Sasaki","Deformation of super Yang-Mills theories in R-R 3-form background",,"Journal of High Energy Physics",,"Vol. 0707",,"pp. 068",2007,July