Extremal Graphs with Respect to the Modified First Zagreb Connection Index. - Guillaume Ducoffe; Ruxandra Marinescu-Ghemeci; Camelia Obreja; Alexandru Popa 001; Rozica Maria Tache (SYNASC, 2018)

The Graceful Chromatic Number for Some Particular Classes of Graphs. - Radu Stefan Mincu; Camelia Obreja; Alexandru Popa 001 (SYNASC, 2019)

Results on graceful chromatic number for particular graphs. - Camelia Obreja (SYNASC, 2020)

Approximate and exact results for the harmonious chromatic number. - Ruxandra Marinescu-Ghemeci; Camelia Obreja; Alexandru Popa 001 (Discuss. Math. Graph Theory, 2024)