A class of trilinear equations which have Wronskian-type solutions is presented. It is shown that the Broer-Kaup system is the simplest nontrivial example which is transformed into the class of equations through suitable dependent variable transformation. © 1990.
Matsukidaira, J., Satsuma, J., & Strampp, W. (1990). Soliton equations expressed by trilinear forms and their solutions. Physics Letters A, 147(8–9), 467–471. https://doi.org/10.1016/0375-9601(90)90608-Q