Tactical Planning in Flexible Production Networks in the Automotive Industry. - Kai Wittek; Thomas Volling; Thomas Spengler; Friedrich-Wilhelm Gundlach (OR, 2010)

Mid-Term Model-Plant Allocation for Flexible Production Networks in the Automotive Industry. - Kai Wittek; Achim Koberstein; Thomas Spengler (OR, 2011)

A two-stage bid-price control for make-to-order revenue management. - Thomas Volling; Derya Eren Akyol; Kai Wittek; Thomas Spengler (Comput. Oper. Res., 2012)