SOR ’21. Proceedings of the 16th International Symposium on Operational Research in Slovenia. SOR ’21 : Proceedings of the 16th International Symposium on Operational Research in Slovenia. Reviewers: Wellington Alves, Josip Arnerić... [et al.]. 1st Edition. Ljubljana : Slovenian Society Informatika, 2021. 706 s. Available on Internet: <http://fgg-web.fgg.uni-lj.si/~/sdrobne/sor/SOR'21%20-%20Proceedings.pdf> ISBN 978-961-6165-57-0.