Koolen, Jack

• The Electronic Journal of Combinatorics Volume 26, Issue 2 (2019) - Papers
  Non-Bipartite Distance-Regular Graphs with a Small Smallest Eigenvalue
  Abstract  PDF
• The Electronic Journal of Combinatorics Volume 28, Issue 4 (2021) - Papers
  Thin Distance-Regular Graphs with Classical Parameters $(D,q,q, \frac{q^{t}-1}{q-1}-1)$ with $t> D$ are the Grassmann Graphs
  Abstract  PDF
• The Electronic Journal of Combinatorics Volume 29, Issue 2 (2022) - Papers
  There Does Not Exist a Strongly Regular Graph with Parameters $(1911,270,105,27)$
  Abstract  PDF
• The Electronic Journal of Combinatorics Volume 31, Issue 2 (2024) - Papers
  On the (Non-)Existence of Tight Distance-Regular Graphs: a Local Approach
  Abstract  PDF