Xiaomei Cong, Susan M. Ludington-Hoe, Naveed Hussain, Regina M. Cusson, Stephen Walsh, Victoria Vazquez, Carrie-Ellen Briere, Dorothy Vittner,
Parental oxytocin responses during skin-to-skin contact in pre-term infants Early Human Development. ,vol. 91, pp. 401- 406 ,(2015) ,
10.1016/J.EARLHUMDEV.2015.04.012