Appealing to external bibliographic systems is an inevitable stage when organizing in-house resources in research libraries and information services. On the one hand, data from external sources can be widely used when working with institutional repositories, e.g., at the stage of searching for data on the organization's papers, creating alerts for new entries or exporting data using appropriate formats to cut the time for bibliographic metadata processing. On the other hand, the most complete data from in-house databases can be used for data correction in external bibliographic systems to increase data accuracy in the organization's publication profiles and enhancing the visibility of bibliographic information for the scientific community. During this time of open science, the use of open access bibliographic systems is becoming more promising, especially in the light of expensiveness and other problems with access to commercial bibliographic products. The paper draws on a set of papers of one of the Russian Academy of Sciences organizations to demonstrate the facilities of open access bibliographic resources when working with institutional repository. We compare the previously used commercial systems Web of Science and Scopus with the open access Russian Science Citation Index, Dimensions, and Lens with regard to coverage of organizations' papers, as well as external databases' appropriateness for library technological processes.