TY  - GEN 
AU  - Delgado-Quirós, Lorena
AU  - Aguillo, Isidro F.
AU  - Martín Martín, Alberto
AU  - Delgado López-Cózar, Emilio
AU  - Orduña-Malea, Enrique
AU  - Ortega, José Luis
PY  - 2023
UR  - https://hdl.handle.net/10481/85900
AB  - This study analyses the coverage of seven free-access bibliographic databases (Crossref, Dimensions—non-subscription version, Google Scholar, Lens, Microsoft Academic, Scilit, and Semantic Scholar) to identify the potential reasons that might cause...
LA  - eng
PB  - Wiley
TI  - Why are these publications missing? Uncovering the reasons behind the exclusion of documents in free-access scholarly databases
DO  - 10.1002/asi.24839
ER  -