M. Bortnyi, I. Kramnoi, I. Voronzhev, and R. Churilin, “X-RAY AND PATHOMORPHOLOGICAL FEATURES OF PULMONARY DISORDERS IN PREMATURE NEONATES”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 12, pp. 35-37, 1.