Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
152,556
Country Rank
445
Institution Rank : 18
![](https://cdn.adscientificindex.com/logos/9771.png)
![Portugal](/flags/pt.png)
![Gilberto Alves](https://cdn.adscientificindex.com/pictures/11/4368484.jpg)
Pharmacology
Pharmacokinetics
Biopharmacy
Bioanalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,561
4,437
0.676
* Total Citation Counts Rankings
World Rank
289,268
Country Rank
913
Institution Rank : 42
![](https://cdn.adscientificindex.com/logos/9771.png)
![Portugal](/flags/pt.png)
![Samuel Silvestre](/user/assets/images/profile/no-profile-photo.png)
Mediicnal Chemistry
Pharmacology
Toxicology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,324
2,356
0.709
* Total Citation Counts Rankings
World Ranking
152,556
Country Ranking
445
Institution Ranking
18
Gilberto Alves
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,561
4,437
0.676
![](https://cdn.adscientificindex.com/logos/9771.png)
Pharmacology
Pharmacokinetics
Biopharmacy
Bioanalysis
* Total Citation Counts Rankings
World Ranking
289,268
Country Ranking
913
Institution Ranking
42
Samuel Silvestre
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,324
2,356
0.709
![](https://cdn.adscientificindex.com/logos/9771.png)
Mediicnal Chemistry
Pharmacology
Toxicology