  The assumption of source independence was used to reveal nonlocal (apart from
standard Bell-CHSH scenario) nature of correlations generated in entanglement
swapping experiments. In this work, we have derived a set of sufficient
criteria, imposed on the states (produced by the sources) under which source
independence can reveal nonbilocal nature of correlations in a quantum network.
To show this, we have considered real two qubit X states thereby discussing the
various utilities of assuming source independence in a quantum network.
