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The distribution of the bibliographic records by document type (N=3619).
| Type of document | Frequency, n (%) |
| Article | 2050 (56.64) |
| Conference paper | 972 (26.85) |
| Review | 241 (6.65) |
| Editorial | 126 (3.48) |
| Note | 66 (1.82) |
| Conference review | 59 (1.6) |
| Letter | 57 (1.57) |
| Book chapter | 31 (0.85) |
| Short survey | 9 (0.21) |
| Data paper | 4 (0.1) |
| Erratum | 4 (0.1) |
