On a conjecture of berge. - S. E. Markosian; G. S. Gasparian; A. S. Markosian (J. Comb. Theory B, 1992)

Minimal Imperfect Graphs: A Simple Approach. - G. S. Gasparian (Comb., 1996)

beta-Perfect Graphs. - S. E. Markossian; G. S. Gasparian; Bruce A. Reed (J. Comb. Theory B, 1996)

On essential components and critical sets of a graph. - S. E. Markossian; G. S. Gasparian; I. Karapetian; A. S. Markosian (Discret. Math., 1998)