  It is shown that quasi-Langevin method can be used for the calculation of the
shot noise in correlated single-electron tunneling. We generalize the existing
Fokker-Plank-type approach and show its equivalence to quasi-Langevin approach.
The advantage of the quasi-Langevin method is a natural possibility to describe
simultaneously the high (``quantum'') frequency range.

Strongly Correlated Electrons