G. E, Tastanova. “Methodological Approaches to Assessing Morphological Changes in the Umbilical Cord in Fetoplacental Insufficiency: Research Results”. EUROPEAN JOURNAL OF INNOVATION IN NONFORMAL EDUCATION, vol. 4, no. 12, Dec. 2024, pp. 125-31, https://inovatus.es/index.php/ejine/article/view/4725.