On graphs with the smallest eigenvalue at least -1 - √2, part I. - Tetsuji Taniguchi (Ars Math. Contemp., 2008)

On graphs with the smallest eigenvalue at least -1 - √2, Part II. - Tetsuji Taniguchi (Ars Math. Contemp., 2012)

On fat Hoffman graphs with smallest eigenvalue at least -3. - Hye Jin Jang; Jack H. Koolen; Akihiro Munemasa; Tetsuji Taniguchi (Ars Math. Contemp., 2014)

Fat Hoffman graphs with smallest eigenvalue at least -1 - τ. - Akihiro Munemasa; Yoshio Sano; Tetsuji Taniguchi (Ars Math. Contemp., 2014)

On the smallest eigenvalues of the line graphs of some trees. - Akihiro Munemasa; Yoshio Sano; Tetsuji Taniguchi (CoRR, 2014)

Fat Hoffman graphs with smallest eigenvalue greater than -3. - Akihiro Munemasa; Yoshio Sano; Tetsuji Taniguchi (Discret. Appl. Math., 2014)

Edge-signed graphs with smallest eigenvalue greater than -2. - Gary R. W. Greaves; Jack H. Koolen; Akihiro Munemasa; Yoshio Sano; Tetsuji Taniguchi (J. Comb. Theory B, 2015)

Questions and Answers Database Construction for Adaptive Online IRT Testing Systems: Analysis Course and Linear Algebra Course. - Hideo Hirose; Masanori Takatou; Yusuke Yamauchi; Tetsuji Taniguchi; Tatsuhiro Honda; Fujio Kubo; Mitsunori Imaoka; Tetsuya Koyama (IIAI-AAI, 2016)

Rediscovery of Initial Habituation Importance Learned from Analytics of Learning Check Testing in Mathematics for Undergraduate Students. - Hideo Hirose; Masanori Takatou; Yusuke Yamauchi; Fujio Kubo; Tetsuji Taniguchi; Mitsunori Imaoka; Tetsuya Koyama (IIAI-AAI, 2017)

On graphs with the smallest eigenvalue at least -1 - √2, part III. - Sho Kubota; Tetsuji Taniguchi; Kiyoto Yoshino (Ars Math. Contemp., 2019)

Signed analogue of line graphs and their smallest eigenvalues. - Alexander L. Gavrilyuk; Akihiro Munemasa; Yoshio Sano; Tetsuji Taniguchi (J. Graph Theory, 2021)

Quantum walks defined by digraphs and generalized Hermitian adjacency matrices. - Sho Kubota; Etsuo Segawa; Tetsuji Taniguchi (Quantum Inf. Process., 2021)