Thanassoulis, EmmanuelSilva, MariaPodinovski, Victor V.2020-04-152020-04-152020Thanassoulis, E., Silva, M. C., Podinovski, V. V. (2020). Preface: International conference on data envelopment analysis—DEA40, 16–18 April 2018. Annals of Operations Research0254-5330http://hdl.handle.net/10400.14/30266engPreface: International conference on data envelopment analysis—DEA40, 16–18 April 2018journal article10.1007/s10479-020-03564-11572-933885081932599000520625000002