1. Disk semi-trailer harrow BDP-6=2 N [Text] / Ministry of Agriculture of the Russian Federation. Federal State Budgetary Institution Altai State Machine Testing Station, test report dated 12.09.2018 No. 01-21-18 (5020592).
2. Disk harrow upgraded BDM-4x4P (discator) [Text] / The Ministry of Agriculture of Russian Federation, Federal State Budgetary Institution Kuban State Machine Testing Station, test report dated 06.10.2015 No. 07-39-2005 (4020422). – P.4.
3. Disk harrow BDM-6x4PK [Text] / Ministry of Agriculture of the Russian Federation. Federal State Budgetary Institution Kuban State Machine Testing Station, test report dated 11/21/2017 No. 07-55-2017 (5020662). – P.4.
4. Disk harrow Rumba 5×2PC [Text] / Ministry of Agriculture of the Russian Federation, Federal State Budgetary Institution Kuban State Machine Testing Station, test report dated 05.12.2018 No. 07-98-2018 (5020922). – P.5.
5. Disk harrow BDM-7x3PK SHK [Text] / The Ministry of Agriculture of the Russian Federation. Federal State Budgetary Institution Vladimir State Machine Testing Station, test report No. 03-66-18 (5020642) dated 11/21/2018. – P. 4.