On the computational complexity of upper fractional domination. - Grant A. Cheston; Gerd Fricke; Stephen T. Hedetniemi; David Pokrass Jacobs (Discret. Appl. Math., 1990)

Classes of Graphs for Which Upper Fractional Domination Equals Independence, Upper Domination, and upper Irredundance. - Grant A. Cheston; Gerd Fricke (Discret. Appl. Math., 1994)

Representations of graphs modulo n. - Anthony B. Evans; Gerd Fricke; Carl C. Maneri; Terry A. McKee; Manley Perkel (J. Graph Theory, 1994)

The Private Neighbor Cube. - Michael R. Fellows; Gerd Fricke; Stephen T. Hedetniemi; David Pokrass Jacobs (SIAM J. Discret. Math., 1994)

Properties of minimal dominating functions of graphs. - Ernest J. Cockayne; Gerd Fricke; Stephen T. Hedetniemi; Christina M. Mynhardt (Ars Comb., 1995)

Distance independence domination in graphs. - Gerd Fricke; Stephen T. Hedetniemi; Michael A. Henning (Ars Comb., 1995)

On a Nordhaus-Gaddum type problem for independent domination. - Ernest J. Cockayne; Gerd Fricke; Christina M. Mynhardt (Discret. Math., 1995)

Maximal Irredundant Functions. - Gerd Fricke; Stephen T. Hedetniemi; David Pokrass Jacobs (Discret. Appl. Math., 1996)

An Algorithm to Find Two Distance Domination Parameters in a Graph. - Gerd Fricke; Michael A. Henning; Ortrud Oellermann; Henda C. Swart (Discret. Appl. Math., 1996)

Independence and Irredundance in k-Regular Graphs. - Gerd Fricke; Stephen T. Hedetniemi; David Pokrass Jacobs (Ars Comb., 1998)

On perfect neighborhood sets in graphs. - Gerd Fricke; Teresa W. Haynes; Sandra Mitchell Hedetniemi; Stephen T. Hedetniemi; Michael A. Henning (Discret. Math., 1999)

Irredundance and domination in kings graphs. - Odile Favaron; Gerd Fricke; Dan Pritikin; Joël Puech (Discret. Math., 2003)

Offensive alliances in graphs. - Odile Favaron; Gerd Fricke; Wayne Goddard; Sandra Mitchell Hedetniemi; Stephen T. Hedetniemi; Petter Kristiansen; Renu C. Laskar; R. Duane Skaggs (Discuss. Math. Graph Theory, 2004)

γ-graphs of graphs. - Gerd Fricke; Sandra Mitchell Hedetniemi; Stephen T. Hedetniemi; Kevin R. Hutson (Discuss. Math. Graph Theory, 2011)