[0] Config.pm:311> INFO - This is Biber 2.16
[0] Config.pm:314> INFO - Logfile is 'dokument.blg'
[148] biber:340> INFO - === sre jun  2, 2021, 11:13:15
[171] Biber.pm:415> INFO - Reading 'dokument.bcf'
[294] Biber.pm:952> INFO - Found 0 citekeys in bib section 0
[311] Utils.pm:395> WARN - The file 'dokument.bcf' does not contain any citations!
[325] bbl.pm:654> INFO - Writing 'dokument.bbl' with encoding 'UTF-8'
[325] bbl.pm:757> INFO - Output to dokument.bbl
[325] Biber.pm:128> INFO - WARNINGS: 1