@article{Aomoto:202213, author = "Aomoto, Kazuhiko and Ito, Masahiko", title = "{Product of Hessians and Discriminant of Critical Points of Level Function for Hypergeometric Integrals}", doi = "10.22323/1.383.0009", journal = "PoS", year = 2022, volume = "MA2019", pages = "009" }