[0] Config.pm:312> INFO - This is Biber 2.15
[0] Config.pm:315> INFO - Logfile is 'presentation.blg'
[52] biber:330> INFO - === mar. avril 20, 2021, 16:25:42
[60] Biber.pm:415> INFO - Reading 'presentation.bcf'
[103] Utils.pm:384> WARN - No data sources defined!