A 3/2-approximation for big two-bar charts packing. - Adil I. Erzin; Stepan Nazarenko; Gregory Melidi; Roman V. Plotnikov (CoRR, 2020)

Approximation Algorithms for Two-Bar Charts Packing Problem. - Adil I. Erzin; Gregory Melidi; Stepan Nazarenko; Roman V. Plotnikov (CoRR, 2021)

Two-Bar Charts Packing Problem. - Adil I. Erzin; Gregory Melidi; Stepan Nazarenko; Roman V. Plotnikov (Optim. Lett., 2021)