Dehghani,K , , Mirjalili,S R , and Mollah Hasanzadeh,M . "Investigating the Effect of Two Feeding Methods with Cup and Finger on Feeding Tolerance and Gain Weight in Preterm Infants Admitted to the Neonatal Intensive Care Unit", Journal of Pediatric Perspectives, 9, 12, 2021, 15083-15093. doi: 10.22038/ijp.2021.59864.4655