Penkov, D., Andonova, V., Delev, D., Kostadinov, I., Kassarova, M. Antioxidant Activity of Dry Birch (Betula Pendula) Leaves Extract. Plovdiv: 2018 571-579,.
Penkov, D., Andonova, V., Delev, D., Kostadinov, I., Kassarova, M. Antioxidant Activity of Dry Birch (Betula Pendula) Leaves Extract. Plovdiv: 2018 571-579,.
Penkov, D., Andonova, V., Delev, D., Kostadinov, I., Kassarova, M. (2018) Antioxidant Activity of Dry Birch (Betula Pendula) Leaves Extract, Plovdiv: 571-579,.
Penkov, D., Andonova, V., Delev, D., Kostadinov, I., & Kassarova, M. (2018). Antioxidant Activity of Dry Birch (Betula Pendula) Leaves Extract. Plovdiv: 571-579.
Penkov D, Andonova V, Delev D, Kostadinov I, Kassarova M. Antioxidant Activity of Dry Birch (Betula Pendula) Leaves Extract. Plovdiv: 2018. p. 571-579.