Abdesslam Boutayeb obtained his PhD in Numerical Analysis from Brunel University, UK in 1990 and spent 35 years doing research, supervising MSc and PhD students and teaching mathematics at University Mohammed Premier, Oujda, Morocco. He has published more than 120 papers, 50 chapters in books and 15 conference papers, and edited or authored 16 books with Nova Science Publishers, Cambridge Scholars Publishing, Eliva Press Global, BOHR Publishers and Springer Nature . As a consultant with the World Health Organization, he has written 7 reports dealing with public health, health equity and social determinants especially in WHO-Eastern Mediterranean Region. He was ranked among the top 2 percent of the world's most cited scientists according to the American Stanford University ranking, during 2020, 2021, 2023, 2024, 2025 and 2026. Scopus h-index:23 Google Scholar h-index:34