Yh. Wei et Zz. Zhong, NONDIAGONAL SEED UNIVERSES AND A NETWORK OF DOUBLE GRAVITATIONAL SOLITON UNIVERSES, International journal of theoretical physics, 32(8), 1993, pp. 1423-1434
By using the double Ehlers transformations and gamma transformations,
new non-diagonal seed solutions are obtained. From these seed solution
s we obtain a network of double gravitational soliton solutions. The d
ouble gravitational inverse scattering method is used to give some con
crete examples of new solutions.