Mistake with is empty condition in following line:
https://github.com/slims/slims9_bulian/blob/ce0afea598cf9a81974b3ea5d150534337b7b695/admin/modules/bibliography/import.php#L253

Correct should be checking if `$subjects` is empty in that part.
admin/modules/import: Wrong attribute in chekc if empty condition
This is a GitHub Issue
repo:slims9_bulian
owner:slims
Title : admin/modules/import: Wrong attribute in chekc if empty condition
Issue date:

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Mistake with is empty condition in following line:
https://github.com/slims/slims9_bulian/blob/ce0afea598cf9a81974b3ea5d150534337b7b695/admin/modules/bibliography/import.php#L253

Correct should be checking if `$subjects` is empty in that part.
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