TY - BOOK AU - Hermann, Robert TI - Gemetric theory of nonlinear differential equations Backlund transformations and solitons, : Part B T2 - Interdisciplinary Mathematics SN - 091569218X PY - 1977/// CY - Brookline PB - Math Sci Press KW - Differential Equations N1 - B L3.1-L3.19 ER -