Geometric Conditions for the Extendability of Ternary Linear Codes. - Tatsuya Maruta; Kei Okamoto (WCC, 2005)

Some improvements to the extendability of ternary linear codes. - Tatsuya Maruta; Kei Okamoto (Finite Fields Their Appl., 2007)

On optimal non-projective ternary linear codes. - Mito Takenaka; Kei Okamoto; Tatsuya Maruta (Discret. Math., 2008)

Extendability of 3-weight (mod q) linear codes over Fq. - Tatsuya Maruta; Kei Okamoto (Finite Fields Their Appl., 2009)