An optimal and a heuristic algorithm for the single-item retrieval problem in puzzle-based storage systems with multiple escorts. - Altan Yalcin; Achim Koberstein; Kai-Oliver Schocke (Int. J. Prod. Res., 2019)

Motion and layout planning in a grid-based early baggage storage system. - Altan Yalcin; Achim Koberstein; Kai-Oliver Schocke (OR Spectr., 2019)