[0] Config.pm:312> INFO - This is Biber 2.15
[0] Config.pm:315> INFO - Logfile is 'presentation.blg'
[48] biber:330> INFO - === mar. juin  1, 2021, 18:03:35
[56] Biber.pm:415> INFO - Reading 'presentation.bcf'
[99] Utils.pm:384> WARN - No data sources defined!