Gribovskaia, I. V.Lee, C. L.Strusevich, V.de Werra, D.2006-08-162006-08-162006-08-16200610.1016/j.orl.2005.07.006https://infoscience.epfl.ch/handle/20.500.14299/233077WOS:0002377272000138680Three is easy, two is hard: open shop sum-batch scheduling problem refinedtext::journal::journal article::research article