. Reliable research use relies on sufficiently accurate, unbiased and comprehensive information, which is ideally verifiable also based on external  sources. In practice, the raw bibliographic records have to be systematically harmonized and quality controlled.
Bias in terms of data collection processes or quality may hinder productive use of the bibliographies as a research resource.

Source code can be made available but bibliographies are not openly available. This sets remarkable limitations of efficient and collaborative research use, and accumulation of knowledge regarding the research use of these digital resources.