On non-symmetric commutative association schemes with exactly one pair of non-symmetric relations.

G. L. Chia W. K. Kok On non-symmetric commutative association schemes with exactly one pair of non-symmetric relations. 3189-3222 2006 306 Discrete Mathematics 24 http://dx.doi.org/10.1016/j.disc.2006.06.005 db/journals/dm/dm306.html#ChiaK06