V. Rusin, Y. Levchak, V. Rusin, and F. Gorlenko, “MINIINVASIVE METHODS OF SURGICAL TREATMENT OF VARICOSE DISEASE OF LOWER LIMBS WITH TROPHIC DISORDERS”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 7, pp. 59-62, 1.