Niemeier lattices and Type II codes over Z4. - Alexis Bonnecaze; Philippe Gaborit; Masaaki Harada; Masaaki Kitazume; Patrick Solé (Discret. Math., 1999)

Z4-Code Constructions for the Niemeier Lattices and their Embeddings in the Leech Lattice. - Masaaki Harada; Masaaki Kitazume (Eur. J. Comb., 2000)

Z6-Code Constructions of the Leech Lattice and the Niemeier Lattices. - Masaaki Harada; Masaaki Kitazume (Eur. J. Comb., 2002)

On a 5-design related to an extremal doubly even self-dual code of length 72. - Masaaki Harada; Masaaki Kitazume; Akihiro Munemasa (J. Comb. Theory A, 2004)

On some self-dual codes and unimodular lattices in dimension 48. - Masaaki Harada; Masaaki Kitazume; Akihiro Munemasa; Boris Venkov (Eur. J. Comb., 2005)

Extremal self-dual codes of length 64 through neighbors and covering radii. - Naoki Chigira; Masaaki Harada; Masaaki Kitazume (Des. Codes Cryptogr., 2007)

The Hall-Janko graph and the Witt system W10. - Naoyuki Horiguchi; Masaaki Kitazume; Hiroyuki Nakasora (Eur. J. Comb., 2008)

A construction of the sporadic Suzuki graph from U3(4). - Andries E. Brouwer; Naoyuki Horiguchi; Masaaki Kitazume; Hiroyuki Nakasora (J. Comb. Theory A, 2009)

On the Classification of Extremal Doubly Even Self-Dual Codes with 2-Transitive Automorphism Group - Naoki Chigira; Masaaki Harada; Masaaki Kitazume (CoRR, 2013)

On the classification of extremal doubly even self-dual codes with 2-transitive automorphism groups. - Naoki Chigira; Masaaki Harada; Masaaki Kitazume (Des. Codes Cryptogr., 2014)

Self-Dual Codes Related to the Rudvalis Group. - Naoki Chigira; Masaaki Kitazume (Graphs Comb., 2018)