Optimal K-secure graphs. - Georg Gunther; Bert L. Hartnell (Discret. Appl. Math., 1980)

Neighbour-connectivity in regular graphs. - Georg Gunther (Discret. Appl. Math., 1985)

Neighbor-connected graphs and projective planes. - Georg Gunther; Bert L. Hartnell; Richard J. Nowakowski (Networks, 1987)

Graphs whose Vertex Independence Number is Unaffected by Single Edge Addition of Deletion. - Georg Gunther; Bert L. Hartnell; Douglas F. Rall (Discret. Appl. Math., 1993)

Star-factors and k-bounded total domination. - Georg Gunther; Bert L. Hartnell; Douglas F. Rall (Networks, 1996)

Limited packings in graphs. - Robert P. Gallant; Georg Gunther; Bert L. Hartnell; Douglas F. Rall (Discret. Appl. Math., 2010)