Leavitt path algebras of bi-separated graphs have been recently introduced by R. Mohan and B. Suhas. These algebras provide a common framework for studying various generalisations of Leavitt path algebras. In this paper we obtain modules for the Leavitt path algebra $L(\dot E)$ of a finitely bi-separated graph $\dot{ E}=(E,C,D)$ by introducing the notion of a representation graph for $\dot{ E}$. Among these modules we find a class of simple modules. If the bi-separation on $E$ is the Cuntz-Krieger bi-separation (and hence $L(\dot{ E})$ is isomorphic to the usual Leavitt path algebra $L(E)$), one recovers the celebrated Chen simple modules.
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