The First Hochschild Cohomology Group of a Cluster tilted Algebra Revisited. - Ibrahim Assem; Juan Carlos Bustamante 002; Kiyoshi Igusa; Ralf Schiffler (Int. J. Algebra Comput., 2013)

Combinatorics of Exceptional Sequences in Type A. - Alexander Garver; Kiyoshi Igusa; Jacob P. Matherne; Jonah Ostroff (Electron. J. Comb., 2019)