@techreport{repORt:2018-043, author = {S. Goderbauer and M. Comis and F.J.L. Willamowski}, title = {The Synthesis Problem of Decentralized Energy Systems is strongly NP-hard}, institution = {Lehrstuhl f\"{u}r Operations Research, RWTH Aachen University}, year = {2018}, type = {repORt}, number = {2018--043}, month = {May}, note = {Published in Computers \& Chemical Engineering} }