Куклина, Лариса Владимировна, et al. “RISK FACTORS, THE COURSE OF PREGNANCY AND GESTATIONAL OUTCOMES IN DIFFERENT STAGES OF PREGNANCY IN PRETERM BIRTH”. Mother and Baby in Kuzbass, vol. 22, no. 2, May 2021, pp. 103-8, https://doi.org/10.24411/2686-7338-2021-10029.