Trung Kien, Pham, Nhu Truong, Nguyen, Minh Hiep, Nguyen, AND Thi Phuong, Vu. " Symptoms of Neonatal Pneumonia and Results of Its Treatment in Bac Ninh Obstetrics and Pediatrics Hospital" VNU Journal of Science: Medical and Pharmaceutical Sciences [Online], Volume 35 Number 1 (21 June 2019)