E. Blagoveshchenskiy, Y. Parashuk, Y. Obuchov, G. Malcev, і N. Ivashchenko, «PARACERVICAL ANAESTHESIA WITH SUBNARCOSES DOSES OF KETAMIN APPLICATION AT SMALL GYNECOLOGICAL OPERATIONS», J. V. N. Karazin Khark. Nat. Univ., Ser. Med., вип. 12, с. 23-25, 1.