title: On the history of ecto-ATPases: The role of W. A. Engelhardt.
authors.affiliation: Department of Medicine, University of Montreal, Canada and Faculty of Biology, M. V. Lomonosov Moscow State University, Moscow, Russia, sergei.n.orlov@umontreal.ca.
authors.forename: Sergei N
authors.initials: SN
authors.lastname: Orlov