On orthogonal arrays of strength 3 and 5 achieving Rao's bound. - Ryuzaburo Noda (Graphs Comb., 1986)

An inequality for steiner systems. - Ryuzaburo Noda (Graphs Comb., 1991)

An inequality for steiner systems II. - Ryuzaburo Noda (Graphs Comb., 1996)

Some Inequalities for Steiner Systems. - Ryuzaburo Noda (Eur. J. Comb., 1998)

A Bound for the Lengths of Arcs in Steiner Systems. - Ryuzaburo Noda (Graphs Comb., 1999)

Some bounds for the number of blocks III. - Etsuko Bannai; Ryuzaburo Noda (Discret. Math., 2016)