Clique covers and coloring problems of graphs. - Walter Klotz (J. Comb. Theory B, 1989)

Maximal Dimension of Unit Simplices. - Christian Elsholtz; Walter Klotz (Discret. Comput. Geom., 2005)

Some Properties of Unitary Cayley Graphs. - Walter Klotz; Torsten Sander (Electron. J. Comb., 2007)

Integral Cayley Graphs over Abelian Groups. - Walter Klotz; Torsten Sander (Electron. J. Comb., 2010)

Integral Cayley Graphs Defined by Greatest Common Divisors. - Walter Klotz; Torsten Sander (Electron. J. Comb., 2011)

Pandiagonal Sudokus. - Walter Klotz; Torsten Sander (Electron. J. Comb., 2012)

Distance Powers and Distance Matrices of Integral Cayley Graphs over Abelian Groups. - Walter Klotz; Torsten Sander (Electron. J. Comb., 2012)

GCD-graphs and NEPS of complete graphs. - Walter Klotz; Torsten Sander (Ars Math. Contemp., 2013)

Uniquely colorable Cayley graphs. - Walter Klotz; Torsten Sander (Ars Math. Contemp., 2017)