ISSN (print) 1993-9868
ISSN (online) 2415-3109
15 Karpatska Street
© 2017 Ivano Frankivsk National Technical University of Oil and Gas
All rights reserved.
Every effort has been made to acknowledge original sources and to comply with copyright law.
If cases are identified where this has not been done, please notify the IFNTUOG's Copyright Office firstname.lastname@example.org.