@article{JAC_1997__6_3_a2, author = {Leonard, Douglas A.}, title = {Rational functions and association scheme parameters}, journal = {Journal of Algebraic Combinatorics}, pages = {269--277}, publisher = {mathdoc}, volume = {6}, number = {3}, year = {1997}, language = {en}, url = {http://geodesic.mathdoc.fr/item/JAC_1997__6_3_a2/} }