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Additional information
L'vov Research Institute of Pediatrics, Obstetrics, and Hereditary Pathology. Translated from Meditsinskaya Tekhnika, No. 3, pp. 22–24, May–June, 1990.
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Stupko, A.I., Maiko, S.A. & Khodasevich, O.A. Mechanical action of obstetric perineal specula on the perineal tissues during labor. Biomed Eng 24, 116–118 (1990). https://doi.org/10.1007/BF00573067
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DOI: https://doi.org/10.1007/BF00573067