Beiträge zur Theorie der perfekten Graphen. - Elefterie Olaru (J. Inf. Process. Cybern., 1972)

Zur Charakterisierung perfekter Graphen. - Elefterie Olaru (J. Inf. Process. Cybern., 1973)

Zur Theorie der perfekten Graphen. - Elefterie Olaru (J. Comb. Theory B, 1977)

s-strongly perfect cartesian product of graphs. - Elefterie Olaru; Eugen Mandrescu (J. Graph Theory, 1992)

On Strongly Perfect Graphs and the Structure of Critically-Imperfect Graphs. - Elefterie Olaru (Sci. Ann. Cuza Univ., 1993)

The structure of imperfect critically strongly-imperfect graphs. - Elefterie Olaru (Discret. Math., 1996)

On Strongly Stable Graphs and Some Consequences for Partitionable Graphs. - Elefterie Olaru (Sci. Ann. Cuza Univ., 1998)

Visibility Properties and Forbiden Holes in Graphs. - Cornelius Croitoru; Elefterie Olaru; Mihai Talmaciu (Sci. Ann. Cuza Univ., 2001)

Hardly perfect graphs. - Cornelius Croitoru; Cristian Frasinaru; Elefterie Olaru; Mihai Talmaciu (Sci. Ann. Cuza Univ., 2004)

New Results on Minimal Strongly Imperfect Graphs. - Vasile Anastasoaei; Elefterie Olaru (Sci. Ann. Comput. Sci., 2008)