Obituary: Professor Zdeněk Helus (1935–2016)
Vol.27,No.1(2017)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright © 2017 Michal Zvírotský
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright © 2017 Michal Zvírotský