International Days of Statistics and Economics. International Conference. International Days of Statistics and Economics : Conference Proceedings of the 12th International Days of Statistics and Economics, September 6–8, 2018, Prague, Czech Republic. 1. Edition. Slaný : Libuše Macáková, MELANDRIUM, 2018. online 2063 s. Available on Internet: <https://msed.vse.cz/msed_2018/sbornik/introduction.html> ISBN 978-80-87990-14-8.