佐藤理論
Harada, H. (1987). New Subhierarchies of the KP Hierarchy in the Sato Theory. II. Truncation of the KP Hierarchy. Journal of the Physical Society of Japan, 56(11), 3847-3852.
Harada, H. (1985). New subhierarchies of the KP hierarchy in the Sato theory. I. Analysis of the Burgers-Hopf hierarchy by the Sato theory. Journal of the Physical Society of Japan, 54(12), 4507-4512.