Authors
Rehina Shtoiko
Faculty of Geography, Ivan Franko National University of Lviv, Doroshenka str. 41, Lviv 79000,, Ukraine
Iryna Koinova
Faculty of Geography, Ivan Franko National University of Lviv, Doroshenka str. 41, Lviv 79000,, Ukraine
© 2018 Rehina Shtoiko, Iryna Koinova, published by University of Silesia in Katowice, Institute of Mathematics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.