Sudoku graphs are integral. Sander, Torsten — 2009 The Electronic Journal of Combinatorics [electronic only]
On certain eigenspaces of cographs. Sander, Torsten — 2008 The Electronic Journal of Combinatorics [electronic only]
Integral Cayley graphs over Abelian groups. Klotz, Walter; Sander, Torsten — 2010 The Electronic Journal of Combinatorics [electronic only]
Some properties of unitary Cayley graphs. Klotz, Walter; Sander, Torsten — 2007 The Electronic Journal of Combinatorics [electronic only]
Integral Cayley graphs defined by greatest common divisors. Klotz, Walter; Sander, Torsten — 2011 The Electronic Journal of Combinatorics [electronic only]