Tools of risk management in production processes / Marián Bujna, Christo Ivanov Beloev ; reviewers Plamen Ganchev Kangalov, Vladimír Kročko . Ruse :  Angel Kanchev University of Ruse , 2015 . 105 s . ISBN 978-954-712-654-1
Kategória EPCA do 2021: AAA .