| Citations | Reference | Objective | Country |
| 902 | Keasling et al. 2010 [48] | Lipid-producing microorganisms | USA |
| 604 | Onda et al. 2008 [51] | Hydrolysis of cellulose | Japan |
| 590 | Zhao et al. 2007 [53] | Lipid-producing microorganisms | China |
| 573 | Harris et al. 2010 [58] | Hydrolysis of cellulose | USA |
| 520 | Steinbuchel, 2006 [59] | Lipid-producing microorganisms | Germany |
| 518 | Heeres et al. 2009 [60] | Pyrolysis | Netherlands |
| 451 | Murzin et al. 2008 [61] | Pyrolysis | Finland |
| 364 | Chen et al. 2011 [62] | Lipid-producing microorganisms | USA |
| 245 | Zong et al. 2009 [63] | Lipid-producing microorganisms | China |
| 239 | Corma et al. 2011 [64] | Production of furanic compounds | Spain |