An addition structure on incidence matrices of a BIB design. - Kazuki Matsubara; Masanori Sawa; Daichi Matsumoto; Hiroyuki Kiyama; Sanpei Kageyama (Ars Comb., 2006)

Simple abelian quadruple systems. - Akihiro Munemasa; Masanori Sawa (J. Comb. Theory A, 2007)

A cyclic group action on resolutions of quadruple systems. - Masanori Sawa (J. Comb. Theory A, 2007)

On Minimal Cubature Formulae of Small Degree for Spherically Symmetric Integrals. - Masatake Hirao; Masanori Sawa (SIAM J. Numer. Anal., 2009)

Cubature formulas in numerical analysis and Euclidean tight designs. - Eiichi Bannai; Etsuko Bannai; Masatake Hirao; Masanori Sawa (Eur. J. Comb., 2010)

Optical orthogonal signature pattern codes with maximum collision parameter 2 and weight 4. - Masanori Sawa (IEEE Trans. Inf. Theory, 2010)

Some remarks on Euclidean tight designs. - Masatake Hirao; Masanori Sawa; Yuanyuan Zhou (J. Comb. Theory A, 2011)

Unifying some known infinite families of combinatorial 3-designs. - Masakazu Jimbo; Yuta Kunihara; Reinhard Laue; Masanori Sawa (J. Comb. Theory A, 2011)

A q-Analogue of the Addressing Problem of Graphs by Graham and Pollak. - Saori Watanabe; Kota Ishii; Masanori Sawa (SIAM J. Discret. Math., 2012)

A New Approach for the Existence Problem of Minimal Cubature Formulas Based on the Larman-Rogers-Seidel Theorem. - Masatake Hirao; Hiroshi Nozaki; Masanori Sawa; Vesselin Vatchev (SIAM J. Numer. Anal., 2012)

On positive cubature rules on the simplex and isometric embeddings. - Masanori Sawa; Yuan Xu 005 (Math. Comput., 2014)

On a symmetric representation of Hermitian matrices and its applications to graph theory. - Masanori Sawa (J. Comb. Theory B, 2016)

Existence on Splitting-Balanced Block Designs with Resolvability. - Kazuki Matsubara; Masanori Sawa; Sanpei Kageyama (Graphs Comb., 2017)

Geometric Designs and Rotatable Designs I. - Masanori Sawa; Masatake Hirao; Kanami Ito (Graphs Comb., 2021)

More on the corner-vector construction for spherical designs. - Kenji Tanino; Tomoki Tamaru; Masatake Hirao; Masanori Sawa (CoRR, 2025)