title: Comment on "Towards deterministic equations for Lévy walks: the fractional material derivative".
abstract: The connection of problems considered in the paper by Sokolov and Metzler with stochastic transport in usual space and uniform medium is discussed.
authors.affiliation: Russian Research Center, Kurchatov Institute, 123182 Moscow, Russia. chukbar@dap.kiae.ru
authors.forename: Konstantin V
authors.initials: KV
authors.lastname: Chukbar
authors.forename: Vasily Yu
authors.initials: VY
authors.lastname: Zaburdaev