Kazuki Shibata. Strong Koszulness of the toric ring associated to a cut ideal. Commentarii mathematici Universitatis Sancti Pauli. 2015. 64. 1. 71-80
Kazuki Shibata. Toric Rings and Toric Ideals Arising from Various Configurations. 2015
Hidefumi Ohsugi, Kazuki Shibata. Roots of the Ehrhart polynomial of hypersimplices. Commentarii Mathematici Universitatis Sancti Pauli. 2013. 62. 2. 91-108