On Envy-Free Revenue Approximation for Combinatorial Buyers with Budgets. - Evangelos Markakis; Apostolos Ntokos; Orestis Telelis (Theory Comput. Syst., 2020)

Multiple birds with one stone: Beating 1/2 for EFX and GMMS via envy cycle elimination. - Georgios Amanatidis; Evangelos Markakis; Apostolos Ntokos (Theor. Comput. Sci., 2020)