Yukita, Tomoshige. Local rigidity of right-angled Coxeter groups in hyperbolic 5-space (Geometry of discrete groups and hyperbolic spaces). RIMS Kokyuroku. 2022. 2219. 68-75
鷹本, 大志, 雪田, 友成. 種数2のSchottky群のJørgensen数について-On the Jørgensen Numbers of the Schottky Groups of Genus 2. 学術研究 : 自然科学編. 2021. 69. 1-18