Maximum rooted connected expansion. - Ioannis Lamprou 001; Russell Martin; Sven Schewe; Ioannis Sigalas; Vassilis Zissimopoulos (Theor. Comput. Sci., 2021)

Improved Budgeted Connected Domination and Budgeted Edge-Vertex Domination. - Ioannis Lamprou 001; Ioannis Sigalas; Vassilis Zissimopoulos (Theor. Comput. Sci., 2021)

Fault-Tolerant Total Domination via Submodular Function Approximation. - Ioannis Lamprou 001; Ioannis Sigalas; Ioannis Vaxevanakis; Vassilis Zissimopoulos (TAMC, 2022)

Approximations for Fault-Tolerant Total and Partial Positive Influence Domination. - Ioannis Lamprou 001; Ioannis Sigalas; Ioannis Vaxevanakis; Vassilis Zissimopoulos (CoRR, 2025)