Ai. Dyachenko et Yv. Lvov, ON THE HASSELMANN AND ZAKHAROV APPROACHES TO THE KINETIC-EQUATIONS FOR GRAVITY-WAVES, Journal of physical oceanography, 25(12), 1995, pp. 3237-3238
It is shown for the first time analytically that two different approac
hes describing gravity wave turbulence introduced by Hasselmann in 196
2 and Zakharov in 1968 result in the same kinetic equation for the sec
ond-order correlator.