North-Holland
Colloquium Mathematical Society Janos Bolyai
Hungarian International Colloquium on Combinatorics

van Bon, J., & Brouwer, A. (1988). The distance-regular antipodal covers of classical distance-regular graphs. In Proceedings of the Seventh Hungarian International Colloquium on Combinatorics 1987 (7) (pp. 141–166). North-Holland.