The first Stokes method in the problem of waves on a liquid surface of finite depth
... теории нелинейных поверхностных и внутренних волн. Новосибирск, 1985.
Zaitsev A. A., Rudenko A. I., Alekseeva S. M.
stationary periodic potential gravitational waves on the surface of a liquid, the first Stokes’ method
64-75