Envy-free relaxations for goods, chores, and mixed items. - Kristóf Bérczi; Erika R. Bérczi-Kovács; Endre Boros; Fekadu Tolessa Gedefa; Naoyuki Kamiyama; Telikepalli Kavitha; Yusuke Kobayashi 001; Kazuhisa Makino (Theor. Comput. Sci., 2024)