BULGARIA – CRIMINAL CODE
GENERAL PART
Chapter One - OBJECTIVE AND SCOPE OF APPLICATION OF THE CRIMINAL CODE
Section II - Scope of application of the Criminal Code
Article 7
In the cases of Articles 4 and 5 the pre-trial detention and the punishment served abroad shall be deducted. Where the two punishments are different in kind, the punishment served abroad shall be taken into consideration in determining the punishment by the court.
Reduction of national sentence following pre-trial detention - national proceedings
EDIT.