Open Access
Review
Table 5
Consecutive screening regarding the ‘sustainable biohydrogen production’ bibliographic search.
| Screening Stage | Screening Methodology | Published papers |
|---|---|---|
| 1 | Publication years 2009–2020 | 234 |
| 2 | Review and Research Articles | 168 |
| 3 | Articles in a specific subject area | 135 |
| 4 | Articles relative with our study | 36 |
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