GasLib - A Library of Gas Network Instances. - Martin Schmidt 003; Denis Aßmann; Robert Burlacu; Jesco Humpola; Imke Joormann; Nikolaos Kanelakis; Thorsten Koch; Djamal Oucherif; Marc E. Pfetsch; Lars Schewe; Robert Schwarz; Mathias Sirvent (Data, 2017)