1. Distance regular graphs;Brouwer,1989
2. The theory of non-symmetric association schemes with three classes;Claasen,1986
3. An algebraic approach to the association schemes of coding theory;Delsarte;Philips Research Report Supplements No. 10,1973
4. Cyclotomic schemes over finite, commutative, admissible rings;Goldbach;Indagationes Mathematicae,1992