Molecular velocity auto-correlation of simple liquids observed by NMR MGSE method Janez Stepišnik, Carlos Mattea, Siegfried Stapf and Aleš Mohorič Eur. Phys. J. B, 91 11 (2018) 293 Published online: 21 November 2018 DOI: 10.1140/epjb/e2018-90284-4