1.
Bannai E, Bannai E, Suda S, Tanaka H. On Relative $t$-Designs in Polynomial Association Schemes. Electron. J. Combin. [Internet]. 2015Dec.23 [cited 2026Mar.27];22(4):P4.47. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i4p47