@article{DBLP:journals/jct/Leonard91,
author = {Douglas A. Leonard},
title = {Non-symmetric, metric, cometric association schemes are
self-dual},
journal = {J. Comb. Theory, Ser. B},
volume = {51},
number = {2},
year = {1991},
pages = {244-247},
ee = {http://dx.doi.org/10.1016/0095-8956(91)90039-M},
bibsource = {DBLP, http://dblp.uni-trier.de}
}