Some perfect coloring properties of graphs. - Claude A. Christen; Stanley M. Selkow (J. Comb. Theory B, 1979)

Optimal contention among three senders. - Claude A. Christen (IEEE Trans. Inf. Theory, 1988)

Search problems: One, two or many rounds. - Claude A. Christen (Discret. Math., 1994)

A characterization of n-component graphs. - Claude A. Christen; Giovanni Coray; Stanley M. Selkow (Discret. Math., 1996)