Monodromy of the hypergeometric differential equation of type (3,6) II. The unitary reflection group of order 2 9 . 3 7 . 5 . 7 Keiji Matsumoto, Takeshi Sasaki, Nobuki Takayama, Masaaki Yoshida (1993) Annali della Scuola Normale Superiore di Pisa - Classe di Scienze