Nonlinear Evolution Equations—Two and Three Dimensions
M. J. Ablowitz and R. Haberman
Phys. Rev. Lett. 35, 1185 (1975) - Published 3 November, 1975
Theories of Gravity with Structure-Dependent
M. Camenzind
Phys. Rev. Lett. 35, 1188 (1975) - Published 3 November, 1975