title: Vojtech Jaroslav Kopský (1936-2016).
authors: Department of Physics, The Eberly College of Science, The Pennsylvania State University, Penn State Berks, PO Box 7009, Reading, Pennsylvania 19610, USA.
authors: D B
authors: DB
authors: Litvin
authors: Institute of Physics AV ČR, Na Slovance 2, 182 21 Prague 8, Czech Republic.
authors: V
authors: V
authors: Janovec
keywords: International Tables for Crystallography; group theory; obituary; phase transitions; subperiodic groups