  The thermoelectric effects in three-terminal structures with a quantum dot
are considered. We propose the experimentally consistent protocol for
determination of the transport coefficients in terms of the local and non-local
conductances and thermopowers that can be measured in two steps, applying the
`four probe technique'. This proposal is compared with other approaches
discussed so far in the literature. As an example we study in detail the
thermopower induced by the superconducting electrode in a subgap regime which
might be useful for analysis of novel hybrid devices.
